The Taliban targeted two military posts in western Afghanistan, killing 11 soldiers and setting off gunbattles with the military, Afghan officials said on October 25.

In one attack, in western Farah province, the insurgents stormed a security post, killing nine troops and wounding four. The attack took place on October 24 night in Pusht Road district, said the governor's spokesman, Mohammad Naser Mehri.

An intense, four-hour gunbattle followed the attack and included the use of artillery against the army, Mehri said. Afghan warplanes were deployed and 17 Taliban fighters were killed, he added.

The second took place in neighboring Herat province, also on October 24 night, and targeted an army post in Kushki Kuhna district, killing two soldiers and wounding five, according to Najibullah Najibi, the military's spokesman in Herat.

The attack lasted several hours with the army succeeding in pushing back the Taliban, Najibi said. He added that the Taliban suffered "heavy casualties" but did not provide a figure.

There was no immediate comment from the Taliban on the attacks in Farah and Herat but insurgents have stepped attacks all across Afghanistan, with the last two weeks being particularly deadly for Afghan forces.

Last Thursday, a Taliban attack on a military compound left 43 soldiers dead in southern Kandahar province, a Taliban heartland.

Meanwhile, Afghan officials also reported intense clashes on Monday and Tuesday in northern Jawzjan province between Taliban fighters and rival militants from an Islamic State affiliate that emerged in recent years in Afghanistan.

According to Faqir Mohammad Jawzjani, the provincial chief of police, the fighting left six Islamic State militants and 42 Taliban fighters dead.

Jawzjani said the IS launched an attack on Taliban positions in several locations, capturing several areas and villages from the Taliban in two districts. He estimated that the number of IS fighters in the two districts — Khush Tipa and Darzab — is about 400.