Probe into the incident made little headway as regards who brought the projectiles and from where and whether those were meant for use in Bangladesh or the smugglers were using the country as a transit route only.

A top official of the Criminal Investigation Department (CID) yesterday said, "It seems to us that the projectiles are not so powerful explosives."

Explosives experts were still to examine those, CID chief Foni Bhushan Chowdhury said when contacted last night.

"We are working to find out the source and destination of the projectiles and the persons involved in bringing those," said Abdullah Aref, additional special superintendent of CID, who led the team that recovered those.

The recovery of such a consignment of explosives has made the government concerned as those were smuggled into Dhaka despite tight security, sources noted.

Several teams of intelligence agencies primarily examined the rocket projectiles yesterday and explosives experts might examine those today, CID officials said.

Of the projectiles, 25 were made in England and four in Germany.

Meanwhile, several CID teams are trying to track down one Lalon who brought the projectiles packed in a carton to the office of Trans Air Express courier service at Arambagh. The CID team that seized those also arrested three staff of the courier service.

The three arrestees -- Rezaul Karim, Nur Alam alias Badal and Sayed Kamruzzaman alias Kamrul alias Tanu -- told CID investigators that Lalon kept the carton at their office, saying it would be sent to Chittagong. Then he left the office saying he is going to bring more cartons.

CID officials yesterday produced the arrestees before a Dhaka court seeking a seven-day remand for them. It could not however be known what the court did.