JERUSALEM -- Israel fired warning shots into Syria on Sunday after an apparently errant mortar shell struck an Israeli military post in the Golan Heights, the latest example of regional spillover from Syria’s civil unrest.

The Syrian mortar caused no damage or injuries, but Israeli military officials have grown increasingly alarmed over how fighting between the Syrian army and Syrian rebel groups has inched closer to the Golan Heights border.

Until Sunday, Israel had restrained itself from responding to the handful of instances in which mortar shells and gunfire struck Israeli settlements or military positions in the Golan Heights, which Israel seized from Syria during the 1967 Middle East War.