Acting on a tip-off, 'Q' branch police personnel, who were monitoring the area, found two persons moving about on the seashore, police said.
On seeing the police personnel, the two persons dropped the bags they were carrying and fled. When police opened the two bags, they found the gelatin sticks, 300 detonators and four metre of fuse wire, they said.
Local police detained the two persons identified as Khader and Sahul of Thirupalaikudi in the area and handed them over to the 'Q' branch police which deals with extremist activities.