RIO DE JANEIRO (AP) — The O Globo newspaper says police have identified the officer who allegedly opened fire and killed an 81-year-old man during a demonstration in a Rio de Janeiro slum.

The newspaper says the incident occurred Wednesday night at Manguinhos shantytown when residents hurled rocks at police to protest the arrest of a man on suspicion trafficking marijuana.

O Globo says police tried to control the crowd with pepper spray and after a few minutes shots were fired. Jose Joaquim Santana, who was watching the protest from his house was killed by a stray bullet that entered his brain.

Repeated phone calls to the Rio de Janeiro police department for comment went unanswered on Thursday.