Mangaluru, Jan 21: Several people have been questioned and many suspected places searched as part of the probe into finding out the culprit behind the planting of Improvised Explosive Device at Mangaluru International Airport on January 20, city police commissioner P S Harsha said here on Tuesday.
The bag containing possible explosive substances was found by a CISF official at the entry point of the airport on Monday. it was later defused by the bomb squad.
The commissioner said three police teams probing the case are looking into all angles and hoped to crack it at the earliest.
The probe was progressing well and the suspect who planted the IED would be nabbed soon, he said.
Among those questioned was the auto rickshaw driver in whose vehicle the suspect reached the airport.
Police are also trying to find out whether there is any link between the incident and the bomb threat call received later by the terminal manager against a Bengaluru bound IndiGo flight which left hours late after necessary clearance.
The Bomb Disposal and Detection Squad has sent the residue of the controlled explosion of the device carried out at Kenjar to the Forensic Science Laboratory to find out the nature of the explosive.
Harsha said people have been sending photos and videos of persons looking similar to the suspect to the police, which are being examined.
The auto rickshaw driver who carried the suspect to the airport told the police that the man had another bag in his possession which he left at a salon at Kenjar before going to the airport.
He collected the bag on the way back and got down at Pumpwell junction, the driver said.
Meanwhile, a team of the National Security Guard (NSG) arrived at the MIA on Tuesday to conduct a detailed enquiry into Monday's incident.
They examined the spot where the bomb was found and the entry points to the airport.
The team also visited Kenjar where the IED was detonated by the bomb disposal squad and examined the area to find out the power of the explosion.

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Mumbai (PTI): Ryan Rickelton's whirlwind unbeaten ton was overshadowed by Heinrich Klaasen's unbeaten 65 as Sunrisers Hyderabad defeated Mumbai Indians by six wickets in an IPL match here on Wednesday.
Chasing an imposing 244-run target, Travis Head (76 off 30) and Abhishek Sharma (45 off 24) shared 129 runs for the opening wicket to set the platform for SRH.
Klaasen (65 not out off 30 balls) then displayed his all-round hitting abilities to guide SRH home with the help of Nitish Kumar Reddy (21) and Salil Arora (30 not out off 10) in 18.4 overs.
Earlier, Rickelton's knock powered MI to 243 for five.
MI rode on a 93-run stand between Rickelton (123 not out off 55 balls) and Will Jacks (46 off 22) in 7.1 overs for the opening stand to power the side.
MI skipper Hardik Pandya scored a valuable 31 off 15 balls before being dismissed.
Praful Hinge (2/54), Eshan Malinga (1/29), Sakib Hasan (1/39) and Nitish Kumar Reddy (1/31) were the wicket-takers for SRH.
Brief Scores:
Mumbai Indian: 243 for 5 in 20 overs (Ryan Rickelton 123 not out; Praful Hinge 2/54).
Sunrisers Hyderabad: 249 for 4 in 18.4 overs (Travis Head 76, Heinrich Klaasen 65 not out; AM Ghazanfar 2/51).
