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Ivanhoe Mines reports temporary interruption of underground mining at Kakula mine

Corporate Updates

May 20, 2025

Ivanhoe Mines reports temporary interruption of underground

mining at Kakula mine

■

Operations at Phase 1 and 2 concentrators continue at

reduced capacity from surface stockpiles

■

Operations at Kamoa mine and Phase 3 concentrator

continue uninterrupted

KOLWEZI, DEMOCRATIC REPUBLIC OF THE CONGO – Ivanhoe Mines (TSX: IVN;

OTCQX: IVPAF) reports today that mining operations are temporarily suspended at

the Kakula underground mine at the Kamoa-Kakula Copper Complex, in the

Democratic Republic of the Congo.

Over the past week, seismic activity was experienced in the eastern section of the

Kakula mine, leading to Kamoa Copper’s management team suspending

underground operations on Sunday, May 18, 2025. All employees were safely

brought above ground in line with protocols, and mobile equipment was removed

from the mine workings. No injuries were reported.

Senior management and geotechnical specialists have been mobilized to conduct

a thorough inspection of the Kakula underground mine, which commenced today.

Seismic activity is reported to have significantly reduced in the past 24 hours and

the western section of the Kakula mine has been declared safe for mining

operations to resume imminently.

The inspection will continue into the eastern section of the Kakula mine, where

underground infrastructure, including pumping, may be impacted.

The Phase 1 and 2 concentrators are temporarily operating at a reduced capacity,

processing ore from surface stockpiles. Ore from the western section of the

Kakula mine will also be processed as soon as underground operations resume.

As at April 30, 2025, Kamoa-Kakula’s high- and medium-grade ore surface

stockpiles totaled approximately 3.80 million tonnes at an estimated, blended

average grade of 3.2% copper.

Mining activities at the Kamoa underground mine and processing at the adjacent

Phase 3 concentrator have not been impacted.

Ivanhoe Mines will provide further updates in due course.

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About Ivanhoe Mines

Ivanhoe Mines is a Canadian mining company focused on advancing its three

principal projects in Southern Africa; the expansion of the Kamoa-Kakula Copper

Complex in the DRC, the ramp-up of the ultra-high-grade Kipushi zinc-copper-

germanium-silver mine, also in the DRC; and the phased development of the tier-

one Platreef platinum-palladium-nickel-rhodium-gold-copper Mine in South Africa.

Ivanhoe Mines is exploring for copper in its highly prospective, 54-100% owned

exploration licences in the Western Forelands, covering an area over six times

larger than the adjacent Kamoa-Kakula Copper Complex, including the high-grade

discoveries in the Makoko District. Ivanhoe is also exploring for new sedimentary

copper discoveries in new horizons including Angola, Kazakhstan and Zambia.

Follow Robert Friedland (@robert_ivanhoe) and Ivanhoe Mines (@IvanhoeMines_)

on X.

Information contact

Investors

Vancouver: Matthew Keevil +1.604.558.1034

London: Tommy Horton +44 7866 913 207

Media

Tanya Todd +1.604.331.9834

Forward-looking statements

Certain statements in this news release constitute “forward-looking statements” or “forward-

looking information” within the meaning of applicable securities laws. Such statements and

information involve known and unknown risks, uncertainties, and other factors that may cause

the actual results, performance, or achievements of the company, its projects, or industry results

to be materially different from any future results, performance, or achievements expressed or

implied by such forward-looking statements or information. Such statements can be identified

using words such as “may”, “would”, “could”, “will”, “intend”, “expect”, “believe”, “plan”,

“anticipate”, “estimate”, “scheduled”, “forecast”, “predict” and other similar terminology, or state

that certain actions, events, or results “may”, “could”, “would”, “might” or “will” be taken, occur or

be achieved. These statements reflect the company’s current expectations regarding future

events, performance, and results and speak only as of the date of this news release.

Such statements include, without limitation: i) statements regarding Kakula mine has been

declared safe for mining operations to resume imminently; ii) statements regarding the inspection

will continue into the eastern section of the Kakula mine, where underground infrastructure,

including pumping, may be impacted; iii) statements regarding ore from the western section of

the Kakula mine will also be processed as soon as underground operations resume; and, iv)

Ivanhoe Mines will provide further updates in due course.

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Forward-looking statements and information involve significant risks and uncertainties, should

not be read as guarantees of future performance or results, and will not necessarily be accurate

indicators of whether such results will be achieved. Many factors could cause actual results to

differ materially from the results discussed in the forward-looking statements or information,

including, but not limited to, the factors discussed above and under the “Risk Factors” section in

the company’s MD&A for the three months ended March 31, 2025, and its current annual

information form, and elsewhere in this news release, as well as unexpected changes in laws,

rules or regulations, or their enforcement by applicable authorities; the failure of parties to

contracts with the company to perform as agreed; social or labour unrest; changes in commodity

prices; and the failure of exploration programs or studies to deliver anticipated results or results

that would justify and support continued exploration, studies, development or operations.

Although the forward-looking statements contained in this news release are based upon what

management of the company believes are reasonable assumptions, the company cannot assure

investors that actual results will be consistent with these forward-looking statements. These

forward-looking statements are made as of the date of this news release and are expressly

qualified in their entirety by this cautionary statement. Subject to applicable securities laws, the

company does not assume any obligation to update or revise the forward-looking statements

contained herein to reflect events or circumstances occurring after the date of this news release.

The company’s actual results could differ materially from those anticipated in these forward-

looking statements as a result of the factors outlined in the “Risk Factors” section in the

company’s MD&A for the three months ended March 31, 2025, and its current annual information

form.