The Delhi [Images] police on Tuesday released five sketches of three persons suspected to have planted the bombs in Delhi on Saturday.

One of the sketches was that of the person who purportedly planted the bomb in Ghaffar market in Karol Bagh, while two sketches each were of the two men who placed the bombs near a building in Barakhamba road.

"We appeal to the people to inform the police if they happen to find those resembling to these sketches. Informer's identity will be kept secret," Delhi Police spokesperson Rajan Bhagat told reporters.

The sketches were prepared with the help of at least five eye-witnesses, who claimed to have seen "planting of bombs" in Ghaffar market and Barakhamba Road.

The eye-witnesses, including a teenaged balloon seller, who saw suspected persons placing packets in dustbin at Central Park and Barakhamba Road were called to the police headquarters on Sunday to assist them in making sketches.

Besides the teenaged boy, a father-son duo who sells breadrolls at Barakhamba Road, were also among those called to the headquarters.

Twenty-four people were killed in the five blasts that rocked Delhi on Saturday evening.