“It has been a major advance today,” ruling National Transitional Council spokesman Jalal el-Gallal told Reuters.

“They are on the outskirts.”

Until earlier this week, repeated attempted advances by anti-Qaddafi based in the Misrata area had been blocked more than 50 km from Sirte.

Sirte is one of Qaddafi’s last main bastions along with the towns of Bani Walid and Sabha.