BEIRUT (AP) — Two trucks carrying food and medical supplies into rebel-held neighborhoods in the central Syrian city of Homs turned back under heavy fire Saturday, leaving four paramedics wounded as a cease-fire faltered, Syrian officials said.

Talal Barrazi, the governor of Homs province, told the Lebanon-based Al-Mayadeen TV that the attack occurred late in the afternoon and that the trucks were targeted by two roadside bombs and a mortar shell from the rebel side.