Syrian forces occupy central Hama square - residents

AMMAN (Reuters) - Syrian tanks occupied the main square in central Hama on Wednesday after heavy shelling of the city, residents said, taking control of the site of some of the largest protests against President Bashar al-Assad.

Human rights campaigners say more than 90 people have been killed in Hama since Assad unleashed a military assault on Sunday to regain control, triggering international condemnation and calls from U.S. senators for sanctions on Syria's energy sector.