At least eight people were killed and 13 others were injured on Wednesday after explosions and gunfire at Myanmar’s biggest jail, according to media reports and an account from a witness. Three officials and five visitors died at Yangon’s colonial-era Insein prison after two explosions and gunfire was heard at about 9.40 am local time near the facility’s parcels counter, according to news portals Myanmar Now and Irrawaddy News. It was unclear what caused the explosions.

A witness said soldiers at the prison had opened fire in response to the blasts. “As soon as I heard the blast, I ran out and that’s when I got hurt. The soldiers...at the entrance gate fired shots recklessly,” said the witness, who declined to be named because of security reasons.