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Mineros Reports Fatal Accident at its Nechi Alluvial Property

Mine Development & Operations

Mineros Reports Fatal Accident at its Nechi Alluvial Property

Medellin, Colombia – May 29, 2022 – Mineros S.A. (TSX:MSA, MINEROS:CB) (“Mineros” or the

“Company”) regrets to report an accident resulting in multiple fatalities at its Nechi Alluvial Property

(“Nechi”), Colombia.

On the afternoon of May 28, 2022 , a storm with heavy rain s and strong winds hit Nechi and

overturned the floating beneficiation plant connected to the Llanuras suction dredge (the “Plant”).

A total of eight people, seven employees and one contractor, were working on the Plant at the time

of the accident. Two people were rescued uninjured and were checked by local health

professionals. Two people were confirmed dead and the remaining four, one contractor and three

employees, are currently unaccounted for. Counseling and support is being provided to the affected

families and personnel.

Andrés Restrepo, President and CEO of Mineros, commented “We are deeply saddened by the loss

of life at our Colombian operations. On behalf of the entire Company, I would like to extend our

sympathy to the families, friends and coworkers impacted by this accident. We will continue to

support all those affected; Mineros remains committed to the well–being of all of its personnel.”

Immediately following the accident the Company’s emergency protocols were activated . These

protocols included mobilization of the Company’s emergency response team in coordination with

the relevant local entities, notification to the appropriate government authorities and assistance to

affected workers. A rescue operation commenced immediately and a coordinated search for the

missing workers is currently underway.

All on-site operations have been suspended while the Company and authorities investigate the

accident.

As of the time of this news release, no environmental impact has been reported from the storm or

the overturning of the Plant. The Company continues to monitor th e environmental situation and

has informed the relevant environmental authorities.

ABOUT MINEROS S.A.

Mineros is a Latin American gold mining company headquartered in Medellin, Colombia. The

Company has a diversified asset base, with mines in Colombia, Nicaragua and Argentina and a

pipeline of development and exploration projects throughout the region.

The board of directors and management of Mineros have extensive experience in mining, corporate

development, finance and sustainability. Mineros has a long track record of maximizing shareholder

value and delivering solid annual dividends. For almost 50 years Mineros has operated with a focus

on safety and sustainability at all its operations.

Mineros’ common shares are listed on the Toronto Stock Exchange under the symbol “MSA”, and

on the Colombia Stock Exchange under the symbol “MINEROS”.

For further information, please contact:

Fiona Childe

Investor Relations

+1 (647) 496-3011

[email protected]

Patricia Ospina

Investor Relations Manager

(+57) 42665757

[email protected]

Joshua Lavers

Renmark Financial Communications Inc.

+1 (416) 644-2020 or +1 (212) 812-7680

[email protected]

The Company has been granted an exemption from the individual voting and majority vo ting

requirements applicable to listed issuers under Toronto Stock Exchange policies, on grounds that

compliance with such requirements would constitute a breach of Colombian laws and regulations

which require the directors to be elected on the basis of a slate of nominees proposed for election

pursuant to an electoral quotient system. For further information, please see the Company’s most

recent annual information form filed on SEDAR at www.sedar.com.