Four suspects in the suicide attack on Islamabad's Marriott hotel were sent back to jail by an anti-terrorism court to await charges likely to be brought later this month, police said after a hearing ended on Tuesday. Fifty-five people were killed when an explosive-packed truck blew up outside the hotel in the heart of the capital in an attack on September 20 that authorities suspected was carried out by Islamist militants with ties to Al-Qaeda. The four men, including a doctor and a lawyer, were first brought to court in late October, having been arrested at different locations earlier that month. Handcuffed and their faces covered with hoods, the suspects were not allowed to speak to any one.