India, Aug. 3 -- Mark Lorenzo Villanueva, a 28-year-old man from Long Beach, California, has been arrested as federal investigators charged him with building what looked to be a homemade bomb inside his house and providing financial support to ISIS.

FBI investigators stormed the home of Villanueva, a legal resident of the United States originating from the Philippines, on Friday morning, leading to his detention. Villanueva wired money abroad to individuals he thought were ISIS combatants, showed sympathy for the terrorist organization in online chats, and even asserted that he had the means - and the desire - to commit acts of violence himself, according to federal prosecutors.

In an interview with KTLA, neighbors said they never doubt...