A fire allegedly set during an attempted jailbreak from Venezuelan police holding cells killed 68 people on Wednesday, the country’s top prosecutor and an inmates’ rights group said.

The blaze at the detention facility in Carabobo state is the latest in a series of deadly incidents in Venezuela’s overcrowded jails.

“In light of the terrible events that took place in the Carabobo state police headquarters, where 68 people died in a presumed fire, we have appointed four prosecutors… to clarify these dramatic events,” chief prosecutor Tarek William Saab said on Twitter.