DUBLIN (Reuters) - The troubled Northern Irish peace process looks set to move to the courtroom on Wednesday when Sinn Fein, the IRA`s political arm, challenges Britain`s bid to expel it from peace talks. "My understanding is that we will be in court in the morning," Sinn Fein chairman Mitchel McLaughlin said late on Tuesday after a turbulent second day of multi-party negotiations in Dublin. Britain, accusing the Irish Republican Army of killing two men last week in violation of a ceasefire it declared last July, on Monday set in motion a move to expel Sinn Fein. But the party says it is totally separate from the IRA and is committed to a peaceful resolution of some 30 years of conflict about the future of British rule. Britain says murders by the IRA must result in Sinn Fein being thrown out because participants in the talks are not allowed links with warring guerrillas. The chairman of the talks, former U.S. chairman George Mitchell, will reconvene a round table session at 0930 GMT at which the eight parties taking part will give their views on the bid to expel Sinn Fein. Britain and Ireland, co-sponsors of the talks, will take the final decision on Sinn Fein`s fate. A Protestant "loyalist" party was expelled from the talks late last month when its military wing admitted murdering three Catholics. The current controversy blew up when a suspected drug-dealer was shot dead, and suspicion immediately fell on an IRA front group. The next day a leading "loyalist" was killed and the province`s police chief said last Friday that the IRA was linked to both killings. Mo Mowlam, Britain`s Northern Ireland Secretary, rejected Sinn Fein charges that Britain was treating it unjustly.