A well-built man in his mid-20s with a black bag on his shoulders -- this is the description of one of the bombers who planted the bomb at Lumbini park in Hyderabad, according to eyewitnesses.

The Hyderabad police have been questioning people who were present at the two sites just before the twin bomb blasts on Saturday evening. The police are trying to gather enough information to make a sketch of the accused.

The police are hopeful of releasing the suspects' sketches in a few days. A reward has been announced for those who will be able to give details about the bomber.

The police are also questioning the employees of Gokul Chat if they remember any customer behaving suspiciously on the day of the blast. 

Ironically, the laser show at Lumbini Park was supposed to be cancelled on Saturday. Officials said they had decided to cancel the show as there were hardly any people in the park.

However, the crowd at the park increased in the evening and by the time the show began, there were nearly 600 people present.

A large number of engineering students from Maharsahtra came to watch the show, and this made the authorities change their mind about cancelling the show.

The deadly blasts have again highlighted the need to intstall close circuit televisions in crowded public areas. A German national had installed a video camera at Lumbini Park a year ago. However, the authorities didn't bother to maintain the camera and it stopped working eventually.

If the video camera had still been working, the footage recorded before the blasts would have given the police some clues about the identity of the bombers.