Three Irish guerrillas died in separate shooting incidents in Northern Ireland, two of them the latest victims in a feud within the outlawed Irish National Liberation Army. Police said the third was a top member of the Irish Republican Army, also outlawed, who was shot by his own men in an alleyway, apparently accidentally. One INLA victim, Emanuel Gaerga, 25, was shot while in a Belfast bar. The other, Barry Duffy, 20, was killed in his home in Armagh, 30 miles west of Belfast. The IRA victim was Gerard Longue, 27, who was fatally wounded in Londonderry. The feud within the INLA is for control of the tiny left-wing group which, like the IRA, seeks to drive the British out of Northern Ireland.