Palakkad (Ker),(Agencies): Five people were killed and several others injured as a cracker unit caught fire and explosions ripped through it at Thrangalil near Shornur town in Palakkad District,the police said .

Toll might go up as about 30 people had been working in three sheds where explosive materials were stored, they said .
Firefighters and local rescuers were trying to extinguish the fire .
The site is near a railway track and local people said a train had passed through the area when the explosion took place .