One activist in Douma urged the monitors to return to the besieged city to see what was unfolding in the wake of their departure . `` The security forces have continued their siege on Douma for the second day today , '' said Mohammed , identified only by his first name for safety reasons . NEW : Shelling in Hama causes a number of buildings to collapse , witness says . They say fresh violence erupts in Syria and Syria after U.N. observers leave . Douma is not accepting monitors from Friends of Syria nations , a Friends of Syria official says . John McCain : It is `` absolutely deplorable '' if the regime is killing those who spoke to monitors .
NEW : Shelling in Hama causes a number of buildings to collapse , witness says . They say fresh violence erupts in Syria and Syria after U.N. observers leave . Douma is not accepting monitors from Friends of Syria nations , a Friends of Syria official says . John McCain : It is `` absolutely deplorable '' if the regime is killing those who spoke to monitors .