Tension between the underground movements and the British increased with the increase in operations. On April 23, 1946, an operation undertaken by the Irgun to gain weapons from the Tegart fort at Ramat Gan resulted in a firefight with the police in which an Arab constable and two Irgun fighters were killed, including one who jumped on an explosive device to save his comrades. A third fighter, Dov Gruner, was wounded and captured. He stood trial and was sentenced to be death by hanging, refusing to sign a pardon request.