Infighting has intensified between the Takfiri terrorist groups in the Southern parts of Yemen after the ISIL executed a senior Al-Qaeda commander, media reports said on Saturday. Qassan al-Assadi, a senior Al-Qaeda leader, was executed by the ISIL in Abyan province in Southern Yemen which triggered heavy clashes between the two terrorist groups, the Arabic-language media outlets reported. This is the second time that the ISIL has executed a senior Al-Qaeda commander. Earlier this year the ISIL had executed Al-Qaeda's senior commander Abu Hajar al-Adani. In mid-May, a senior Yemeni military source disclosed that the Saudi regime has coordinated with Al-Qaeda to dispatch a large number of Takfiri terrorists to the strategic regions in Southern Yemen. "Saudi Arabia has stationed a large number of al-Qaeda terrorists around the strategic strait of Bab al-Mandeb in Southern Yemen in line with a US plot to increase its military presence there," Khalil Abdullah told FNA. Abdullah also said that Saudi Arabia has asked its Sudanese mercenaries to advance towards Ta'iz and Lahij provinces. "Hundreds of Al-Qaeda terrorists are now in Southwestern Yemen and they have pointed their artillery at the strategic Bab al-Mandeb Strait," Abdullah said.