BEIRUT (AP) — The Syrian government appeared to have fallen early Sunday in a stunning end to the 50-year rule of the Assad family after a lightning rebel offensive.

The head of a Syrian opposition war monitor said President Bashar Assad had left the country for an undisclosed location, fleeing ahead of insurgents who said they had entered Damascus after a remarkably swift advance across the country.

Syrian Prime Minister Mohammed Ghazi Jalali said the government was ready to “extend its hand” to the opposition and hand over its functions to a transitional government.