Following is the chronology of blasts that rocked the national capital since 1997.

May 25, 2011: Minor blast in a car park outside Delhi High Court, no causalities.
September 27, 2008:  Three persons killed and 21 injured in a low-intensity blast at Mehrauli flower market near Qutab Minar.

September 13, 2008: At least 25 people killed and over 100 injured in five serial blasts within 45 minutes across Connaught place, Ghaffar market in Karol Bagh and M-Block market of Greater Kailash-I in south Delhi.

April 14, 2006: At least 14 people were injured after two explosions at the courtyard of Jama Masjid in the walled city of Old Delhi.

October 29, 2005: Over 59 people were killed and more than 100 injured, including some foreigners, in three explosions that rocked Sarojini Nagar and Paharganj markets and one in a bus in Govindpuri area of Delhi.

May 22, 2005: One person was killed and 60 injured in serial blasts in two cinema halls in Delhi.

June 18, 2000: Two persons, including an eight-year-old girl, were killed and about a dozen others injured in two powerful bomb blasts near the Red Fort in Delhi.

July 26, 1998: High intensity explosion in a bus parked at Kashmiri Gate of Inter-State Bus Terminal (ISBT) killed two and injured three persons.

December 30, 1997: Four commuters killed and around 30 injured in a bomb explosion in a bus near Punjabi Bagh.

November 30, 1997: Twin blasts in Red Fort area leave three killed and 70 injured.

October 26, 1997: Twin bomb blasts in Karol Bagh market leave one dead and 34 injured.

October 18, 1997: One person killed and 23 others injured in twin bomb blasts in Rani Bagh market.

October 10, 1997: One killed, 16 injured in three bomb blasts at Shantivan, Kauria Pul and Kingsway Camp areas.

October 1, 1997: Thirty people injured in two bomb explosions near a procession in the Sadar Bazar area.

January 9, 1997: 50 injured in bomb blast opposite the Delhi Police Headquarters at ITO