Tamil Tiger rebels on Saturday claimed that the Sri Lankan military backed attacks that killed nine guerrillas in the past two weeks and warned of ‘‘dire consequences’’ if the assaults continue. ‘‘It is apparent that the killers have all the assistance from the Sri Lanka Army,’’ the LTTE said in a letter to European ceasefire monitors. The military has denied the allegations.The rebels also asked the monitors to warn the government that ‘‘the entire peace process and the ceasefire agreement are being placed in heavy risk and dire consequences have to be faced.’’‘‘Urgent steps must be taken to conduct an in-depth inquiry and bring to book the culprits,’’ the letter said. —(PTI)