Malaysian police have reportedly confirmed speculation of an attack against Malaysian Islamic State (IS) militant group leader in Syria, Muhammad Wanndy Mohamed Jedi.

English daily The Malay Mail today quoted Special Branch director Mohamad Fuzi Harun as saying that Malaysian police are cooperating with their international counterparts to ascertain Wanndy's fate.

"There was an attack on him (Wanndy) using drones in Syria and we are trying to confirm his condition," Mohamad Fuzi said.

He said police are also verifying the authenticity of a Facebook post by Muhammad Wandy's wife, Nor Mahmudah Ahmad, 28, which had fuelled talk of his death.

"Do not worry, we have our means to check on this,” Fuzi said in response to speculation that the posting could be a decoy planned by Wanndy, who is on the United States' Specially Designated Global Terrorists list.

His wife, who together with him had infiltrated Syria in January 2014, reportedly posted a status which read:

"My dear fighter, finally it’s your time to go. I will remain here and take care of the responsibilities you have left behind.

"Although my heart has not been as strong as I expected, I accept it as fate."

According to The Malay Mail, Wanndy, who also goes by the moniker Abu Hamzah Al-Fateh, was with a fellow IS militant fighter who was also reportedly killed during the attack in Ma'dan.

Wanndy, who hails from Durian Tunggal, Malacca, and Nor Mahmudah, from Perai, Penang, have two daughters born in Syria.

He was also identified as a top IS recruiter and was recently linked to Siti Noor Aishah Atam, who has been jailed five years for possessing books on terrorism.

It was reported that Siti Noor Aishah had allegedly pledged allegiance to IS leader Abu Bakr Al-Baghdadi via the Telegram messaging app, with Wanndy acting as her witness.