Thick black smoke could be seen billowing into the air from a hill on the eastern side of the town, according to the AFP news agency.
A second strike, a few hours later, sent a cloud of smoke over the north-eastern side of the city.
These were the first air strikes since a flurry of attacks yesterday, which some sources said had helped Kurdish fighters of the People's Protection Units (YPG) push back the IS militants.
Meanwhile, reports from Turkey say at least 14 people have been killed in violent demonstrations, as Kurdish protestors call for action to stop IS in neighbouring Syria.
Turkey's president insists a full ground operation is needed to stop the Syrian town on the Turkish border being completely taken over, but is refusing to send his own troops in to help.
Dr Anthony McRoy, lecturer in Islamics at the Wales Evangelical School of Theology, and a Christian, claims the relationship between the two sides has deep-rooted problems.
Speaking on Premier's News Hour, he said: "It goes all the way back really to the creation of the Turkish republic because the Kurds tried to, what's now Turkey, tried to succeed and join up with the other Kurds to form an independent Kurdistan, and that was suppressed by 1925".
Meanwhile, Israel and Lebanon have seen their first cross-border fighting in almost eight years. The Israeli army fired shells into Lebanese territory, following an explosion that wounded two Israeli soldiers.
According to AP, Israel fired toward Hezbollah positions in southern Lebanon on Tuesday after the Shiite guerrillas set off an explosion along the tense border that wounded two Israeli soldiers, in the most serious incident between the two countries in months.
The Israeli military said soldiers were on a patrol when an explosive device went off. Israeli troops then found a second explosive device on the Israeli side of the border, which was detonated by Israeli bomb squads. Israeli forces responded by firing artillery toward two Hezbollah positions in Lebanon.
On its Al-Manar TV station, Hezbollah issued a statement claiming responsibility for the blast, saying it was targeting an Israeli patrol. The admission marked a rare instance of an open clash between the two bitter enemies and a stark flare-up after years of relative calm.
Israel and Lebanon have been in a state of war for six decades, but the border area has remained largely quiet since a month-long war in the summer of 2006 between Israel and Hezbollah. There have been sporadic outbursts of violence since then.
Israel suspects that Hezbollah may be looking to flex its muscles along the border to deflect attention away from its struggles in fighting against Islamic rebels in Syria. Israeli officials said Tuesday's attack marked an escalation, but they did not expect it to devolve into an all-out conflict.
Speaking to Premier's News Hour, Hanna Anbar, executive editor of Beirut's The Daily Star, said: "About a week ago Hezbollah discovered a spying device inside Lebanon and sent one of their experts to dismantle this mine, but as he was working on it the Israelis exploded that device and killed the expert; and we all saw this as retaliation for that incident".
Elsewhere, officials in Baghdad, Iraq, say that IS militants have shot down an Iraqi military helicopter near the refinery town of Baiji.
The two pilots on board have been killed. The town is home to Iraq's largest oil refinery.
Hear more from Dr Antony McRoy, lecturer in Islamics, Wales Evangelical School of Theology:
Hanna Anbar, The Daily Star: