At least 121 people have been killed in Islamic State bombings in Syria.

The extremist group has claimed responsibility for the series of bomb blasts on Government strongholds this morning.

According to the Syrian Observatory for Human Rights monitoring group, 73 people were killed by a suicide car explosion and suicide attacks in the city of Jableh.

48 others were killed by another suicide car explosion and two suicide attacks in the city of Tartus.

The group says these are the first attacked to target the Syrian coast since 2011.