The Delhi [Images] police has announced a reward of Rs one lakh each for anyone who can help in nabbing the 13 absconding Indian Mujahideen [Images] terrorists -- allegedly involved in the serial blasts -- that rocked the national capital on September 13 this year.

The reward, which was announced by Delhi Police Commissioner Y S Dadwal, will hold for a period of one year, a senior police officer said on Wednesday.

While the police is yet to catch the 13 people allegedly involved in the September 13 blasts, it had arrested five persons and killed two others in an encounter.

Those who are at large are: Amir Raja Khan, the alleged chief of Indian Mujahideen, Ariz Khan, Shahzad Ahmad, Mohd Sajid, Mirza Sadab Baig, Mohd Khalid, Dr Shahnawaj, Hakim, Asadullah Akhtar, Salman, Mohd Khalid, Iqbal Batkal and Riyaz Batkal.

Bringing back the horror of the 2005 pre-Diwali serial blasts, five explosions ripped through the city on September 13, in a span of 40 minutes, killing 26 people and injuring 133.

The Central Park in Connaught Place, Barakhamba Road, two places in Greater Kailash and Gaffar Market in Karol Bagh were the terror targets.

As the capital limped back to normalcy, a gunfight between suspected terrorists and sleuths of Delhi Police's elite Special Cell in Jamia Nagar in south Delhi, a week after the blasts, broke the lull.

Two suspected IM terrorists, including Atif Amin, the alleged mastermind of the blasts, were killed while Mohan Chand Sharma, Delhi pPolice's ace-shooter, lost his life in the encounter.