Search operations are on in the city after two phone calls claiming that bombs had been planted in the vicinity of a school and a junior college.
Parents of a local school rushed to the institute to pick up their wards following a threat call that an explosive had been planted in the vicinity, police said.
However, police said they could not find anything despite the bomb disposal squad which rushed to the spot conducted a 45 minute search in the area.
A similar call was reported from Jayanagar area of the city, which said a bomb had been planted in the vicinity of Vijayanagar Junior college.
Police said they rushed to the spot and conducted searches, but have not traced any material so far.
Both calls appear to be hoax, police said, adding that the searches would however continue to rule out the possibility of any explosive material being present at the spots.