Israel said it had attacked Assad regime military targets on Sunday after alleged stray shells from fighting in Syria's civil war landed inside the Israeli-occupied Golan Heights.

The Syrian shells allegedly hit an open area in the northern Golan Heights, causing no injuries, and in retaliation the Israeli military said it "targeted two artillery positions and an ammunitions truck belonging to the Syrian regime".

It was the second day in a row that errant fire from Syria drew Israeli retaliation.

Israel seized 1,200 square kilometers (460 square miles) of the Golan from Syria in the Six-Day War of 1967 and later annexed it in a move never recognized by the international community.

Around 510 square kilometers of the Golan are under Syrian control.

Since the outbreak of Syria's civil war in 2011, the Israeli army has occasionally struck targets inside Syria, especially after shells fired from Syrian territory have fallen inside the Golan Heights, either intentionally or in error.

In April, Israel shot down what it identified only as "a target" over the Golan, hours after Syria accused it of hitting a military position near Damascus airport.