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Two Iraqi soldiers were killed on Wednesday morning and four more injured after anÌý attack on a military base north of Baghdad, Iraqi security sources have told °®Âþµºâ€™s Arabic-language service.

A security source said IS militants assaulted the Iraqi army's 2nd Regiment HQ in the town of Mutaibijah, eastern Salah Al-Din province.

"The IS elements managed to withdraw before reinforcements arrived atÌýthe scene of the attack. The reinforcements began a combing operation to look for the IS elements," he said.

Iraqi security sourcesÌýrecently warned that IS could step up its attacks in the country.

On Monday night, the extremist group claimed responsibility for ,Ìýkilling 35 people and injured scores more.

An officer in Iraq's Joint Operations Command told °®Âþµºâ€™s Arabic-language service:Ìý"Our intelligence information shows that [IS] have a plan to intensify attacks in Baghdad and the liberated provinces."

"The explosion in Sadr City was the first of these attacks, which aim to bring chaos to the security situation in the country," he added.

The officer, who chose to remain anonymous, added that IS'Ìýnew strategy was to carry out attacks in different provinces of Iraq, spread out over a wide geographical area.

"Its goal is to disperse the efforts of security forces," he said, adding that Iraqi security forces have plans to counter the extremist group's escalation in attacks.

IS took control of most of north-central Iraq in 2014 but were militarily defeated in the country by Iraqi government forces and in 2017. However, the extremist group still has active cells in the country and .