A fourth name has emerged in the tangled web of young Canadians sought for possible extremist connections in the aftermath of a deadly terrorist attack in Algeria.

Independent sources in Canadian security and government tell The Canadian Press that Mujahid Enderi, a Libyan-Canadian from southwestern Ontario, is under investigation and being sought by police.

All the sources requested anonymity because they were not authorized to speak publicly about the hunt for Enderi, who goes by the anglicized name of Ryan Enderi.

Enderi dropped off the radar last year and is believed to have travelled overseas around the same time as three other young men from the same community — two of whom died during the siege at Tiguentourine Gas Plant, 1,600 kilometres southeast of Algiers.

Enderi attended the same London, Ont., high school as Ali Medlej, Xristos Katsiroubas and Aaron Yoon, but was several grades behind them.

The Jan. 16 attack and four-day siege on a gas facility in southern Algeria ended with the deaths of 37 hostages and 29 terrorists.

Medlej and Katsiroubas took part in and were killed in the attack.