The United States declared martial law in Puerto Rico and sent the Puerto Rico National Guard to attack Jayuya. The town was attacked by U.S. bomber planes and ground artillery. Even though part of the town was destroyed, news of this military action was prevented from spreading outside of Puerto Rico. It was called an incident between Puerto Ricans. The top leaders of the nationalist party, including Albizu Campos and Blanca Canales, were arrested and sent to jail to serve long prison terms.