Syrian activists say government warplanes target Islamic State stronghold of Raqqa, killing 5

Syrian opposition activists say that government warplanes have struck an eastern city that is a stronghold of an Islamic militant group, killing five civilians.

The Britain-based Syrian Observatory for Human Rights says the jets struck a target near the headquarters of the al-Qaida breakaway group known as the Islamic State of Iraq and the Levant in the provincial capital of Raqqa on Wednesday, also wounding dozens of others.

Another activist group, the Syria-based Local Coordination Committee also reported Wednesday's airstrike on Raqqa and said it claimed at least five lives.

The Islamic State, along with other rebel groups fighting to overthrow Syrian President Bashar Assad, captured Raqqa in March 2013.

Recently, the group has become a major fighting force in Iraq.