GUNMEN IN BEIRUT raked supporters of rebel Christian Gen. Michel Aoun with automatic weapons fire as they rallied at a candlelight vigil and police said Tuesday that at least 26 people were killed and 90 wounded . . . THE NAVY called off the search Monday night for three crewmen of a helicopter that crashed off the Oregon coast, and officials said the men were lost and presumed dead . . . THE ISRAELI-BACKED South Lebanon Army freed 40 Moslem prisoners in a move believed to be related to the plight of 13 Western hostages held in Lebanon, security sources reported.