On the day planned for the attack, April 29, the president was traveling in the capital in his chariot along with his 13-year-old son, Joaquin, and his Chief of Staff, general José María Orellana. Around 10 a.m., the president and his retinue were traveling on 7th S. Avenue, between the 16th and 17th W streets when the bomb detonated. The explosion failed to injure Estrada Cabrera or those that were with him. Only the driver and one of the horses died.