Hundreds of protesters have stormed a federal prosecutor's office in southern Mexico in the latest demonstration against the government's handling of the apparent slaughter of 43 students.
About 300 people, some wearing masks, entered the Guerrero state building in the regional capital Chilpancingo, prompting nearly all staff to leave, a state security official told AFP news agency on Monday.
"None of the employees are being held. The occupation is peaceful," the official said on condition of anonymity.
The demonstrators included members of the radical CETEG teachers union, which has participated in violent protests in recent weeks, including the burning of the state government headquarters and local legislature.
Tens of thousands of people protested in Mexico City and other regions last week, demanding that the authorities find the 43 young men who attended a teachers-training college near Chilpancingo safe and sound.
Authorities say members of the Guerreros Unidos drug gang confessed to killing the students and incinerating their bodies near the city of Iguala after receiving them from corrupt police officers.
But authorities stopped short of declaring them dead, saying they were waiting for DNA evidence.