The airport received the electronic message at 9:58 p.m. on Aug. 2, Gede Eka Sandi Asmadi, communication and legal division head at Ngurah Rai airport, told Kompas.

The airport security committee and other agencies immediately triggered standard threat-response procedures and found no indication the claim was true, he said, adding that flights and passenger services have run normally throughout.

Tribun Bali reported that the message arrived as a WhatsApp to the InJourney Airports contact center from a sender identified by police only by the initials EPD, and that it named a woman by the initials LH as carrying a homemade bomb.

The emergency alert did not reach the Airport Security Services team until 12:44 a.m. on Aug. 3, nearly three hours after the message landed, according to the same report. The airport was placed on Siaga I, its highest alert status, and aviation security, police and military personnel carried out a joint sweep focused on two international flights whose passengers were already aboard.

Criminal investigators began follow-up work as soon as the report came in and have summoned those who received the message, Second Insp. I Gede Suka Artana, spokesman for the Ngurah Rai airport police, told Tribunnews. He told CNN Indonesia that security at the airport is stable and flights are operating as scheduled.