The week in pictures - 9 March to 15 March

Rio de Janeiro, Brazil

Dead fish at the Rodrigo de Freitas lagoon after oxygen levels dropped due to pollution
Dead fish at the Rodrigo de Freitas lagoon after oxygen levels dropped due to pollution Credit: Reuters/Sergio Moraes

Manama, Bahrain

A protester burns tyres used to set up road blocks during clashes with riot police
A protester burns tyres used to set up road blocks during clashes with riot police Credit: REUTERS/Hamad I Mohammed

Vatican City

Pope Francis greets the crowds from the balcony of St Peter's Basilica
Pope Francis greets the crowds from the balcony of St Peter's Basilica Credit: REUTERS

Thun, Switzerland

FC Zurich footballer Loris Benito attempts to remove a marten that ran onto the pitch
FC Zurich footballer Loris Benito attempts to remove a marten that ran onto the pitch Credit: REUTERS/Pascal Lauener

Utah, USA

Astronauts in simulated spacesuits investigate feasibility of a human exploration of Mars
Astronauts in simulated spacesuits investigate feasibility of a human exploration of Mars Credit: REUTERS/Jim Urquhart

North Korea

North Korea's artillery sub-units conduct a live shell firing drill
North Korea's artillery sub-units conduct a live shell firing drill Credit: REUTERS/KCNA

Arizona, USA

Competitor falls off during ostrich race at the annual Ostrich Festival in Chandler
Competitor falls off during ostrich race at the annual Ostrich Festival in Chandler Credit: REUTERS/Joshua Lott

Tultepec, Mexico

Fireworks explode during the annual Quema de toritos (Burning of the bulls) event
Fireworks explode during the annual Quema de toritos (Burning of the bulls) event Credit: REUTERS/Bernardo Montoya