Harassment by agents of app-based loan companies went a notch higher than usual when an agent made a hoax call to a police control room saying a defaulter was making bombs at his house in Mangadu, a suburb of Chennai, on Thursday. Claiming to be calling from Japan, the hoax caller mentioned an address in Muthamizh Nagar in Mangadu and said the occupant, Kabeer Mohammed, 45, was making bombs at the house.