In the early hours of May 29, 1939, 25 members of the Irgun led by Moshe Moldovsky attacked Biyar 'Adas on the grounds that its residents were harboring what they have seen as "gangs".
On the morning of May 29, 1939, a group of 25 Irgun members, under the leadership of Moshe Moldovsky, carried out an early-morning attack on Biyar 'Adas, alleging that local residents were providing shelter to what they perceived as "gangs" or organized groups.