BEIRUT, Aug 3: Syrian tanks stormed Hama under heavy shelling on Wednesday, taking over a main square at the heart of the restive city and cutting off electricity, water and phone lines on the fourth day of an offensive.

Opposition figures and activists accused the regime of striking hard at a moment when world and media attention were distracted by the trial in Egypt of former President Hosni Mubarak.

“Hama is being collectively punished for its peaceful protests calling for the downfall of Bashar Assad,” said Suheir Atassi, a prominent pro-democracy activist. Like many others Syria-based activists, Atassi has gone largely into hiding and spoke to The Associated Press via email. “The Syrian regime is committing crimes against humanity. Where are the free people of the world,” she said.

At least three tanks took up positions in Hama's central Assi square, which in recent weeks had been the site of carnival-like demonstrations by hundreds of thousands of protesters calling for the downfall of President Assad's regime.

A religiously conservative city about 210 kilometres north of the capital with a history of dissent, Hama had largely fallen out of government control since June as residents turned on the regime and blockaded the streets against encroaching tanks.

But Syrian security forces backed by tanks and snipers launched a ferocious military offensive that left corpses in streets on Sunday, tightening their siege on Hama and sending residents fleeing for their lives. The death toll since Sunday has reached around 100, but the exact figure is difficult to verify. The regime may be thinking that regaining control of Hama will blunt the uprising, which is in its fifth month and has so far proved remarkably resilient.

Hama has a history of dissent. In 1982, Assad's father, Hafez Assad, ordered the military to quell a rebellion by Syrian members of the conservative Muslim Brotherhood movement there.—AP