The rebel chief who led the overthrow of the longtime dictator Bashar al-Assad has been declared the head of government for a transitional period.

Syria's de facto leader Ahmed al-Sharaa was declared president for a transitional phase on Wednesday, tightening his hold on power less than two months after he led a campaign that toppled Bashar al-Assad.

Former rebels now controlling Syria name an interim president and throw out the constitution adopted under Assad, saying a new one will be drafted soon.

The Syrian rebel group that ousted Bashar al-Assad last month dissolved parliament, dismantled the country’s armed apparatus and appointed its de facto leader the country’s new president, a series of moves meant to clear the way for a political transition,