Karnataka Chief Minister Jagadish Shettar on Thursday said there was no specific information or alert on the bomb blast that injured 16 people in Bangalore city on Wednesday.
He said the details of the blast will be known soon.
"There was no specific alert or information on this blast," Shettar told reporters on Thursday.
"Investigation is going on and we will soon know the details," he said.
The Karnataka Chief Minister visited K C General Hospital here and met the victims of the blast.
"Today, I met the injured people. The state government will take care of their medical needs," Shettar said.
Meanwhile, NDTV quoting sources reported that a timer or detonator used to trigger off the bomb has been completely gutted in the fire caused by the blast.
Forensic experts have started examining the debris collected from the site of the blast.
At least 16 people, including 11 policemen, were injured in the low intensity blast near the Bharatiya Janata Party (BJP)´s city office in a busy residential area on Wednesday.
The bomb, believed to be placed on a motorcycle with a Tamil Nadu registration plate parked between a van and a car, went off around 10.30 am, about 100 metres from the BJP office in Malleswaram.