ILOILO CITY, June 15 -- The Police Regional Office in Western Visayas (PRO-6) on Monday vowed to go after and file cases against those behind the bomb threat directed at the Iloilo City Hall and Iloilo capitol.

Authorities found no explosive device or suspicious item in either location on Sunday.

In a press conference, PRO-6 director Brig. Gen. Randulf Tuano said he has directed the Iloilo City Police Office (ICPO) and the Regional Anti-Cybercrime Unit (RACU) to address the incident, assuring that the Philippine National Police has the technical capabilities to identify the perpetrators.

"This has to stop. We will file cases and put to jail those behind this," Tuano said.

ICPO Director Col. Wilbert Parilla, in the same briefing, said...