Speaking at a news conference after a meeting of Asian leaders in Malaysia on Sunday, Obama said that the US and its allies will not relent in fight against ISIS terrorists.

"We will destroy them. We will take back land they are currently in, take out their financing, hunt down leadership, dismantle their networks, supply lines and we will destroy them."

He also said that it "would be helpful" if Russia adjusted its way of tackling the terrorists, claiming that Moscow airstrikes hit militants fighting the government of President Bashar al-Assad.

Obama expressed hope that Moscow would agree to a leadership transition in Syria.

"It will not work to keep him (Assad) in power," Obama said. "We can't stop the fighting."

Russia has been conducting air raids against ISIS and other terrorists in Syria since September 30 at the request of the Damascus government.

Moscow says the campaign is aimed at helping the Syrian army in its anti-terror fight and also preventing the return of more than 2,000 Russian nationals who have joined the ranks of ISIS in Syria.

Earlier this month, Putin vowed to catch the ISIS Takfiri militants behind bringing down one of Russia’s passenger planes over Egypt on October 31.

He said Russia would intensify airstrikes against militants in Syria, after Moscow confirmed that a bomb had destroyed the aircraft; Press TV reported.

S/SH