At least 42 people were killed Saturday in the western Syrian city of Homs after al-Qaeda-linked militants attacked two heavily guarded security facilities.

The Syrian Observatory for Human Rights, a Britain-based monitoring network, said suicide bombers blew themselves up and gunmen opened fire outside the headquarters of general and military intelligence, two of the most fortified complexes in the area.

An al-Qaeda-linked alliance of rebel groups known as Tahrir al-Sham said it was responsible for the attacks, which took place as Syrian government and opposition delegates met in Geneva for the latest round of a stuttering peace process.

The Syrian Observatory for Human Rights said the bombings had killed at least 42 people, all of them security personnel, in the districts of Ghouta and Mahatta.