A second explosion has hit the city of Kandahar in southern Afghanistan, a day after more than 40 people there were killed in a truck bombing.
Al Jazeera's Zeina Khodr, reporting from the city, said Wednesday's blast was thought to have been caused by a rocket.
She said the explosion occurred at about 10.30pm, hitting a square in the centre of the city close to a branch of the Kabul Bank.
Firefighters battled the blaze for more than an hour and our correspondent reported a heavy security presence at the scene along with several ambulances.
The number of casualties is not yet known, but the streets were largely empty at the time with the city still reeling from Tuesday's deadly attack and many Kandahar residents observing the fasting month of Ramadan.
Dangerous city
Michael Griffin, an expert on Afghanistan, told Al Jazeera: "It came five or six days after the maximum alert had passed, so it was easier to go under the radar.
A Taliban spokesman had earlier denied responsibility for Tuesday's bombing.
Wednesday's attack comes just hours after the governor of Kandahar handed responsibility for the city's security over to the army.
The police have promised to arrest the perpetrators of Tuesday's attack in the heart of the city within 72 hours.
Kandahar is the biggest city in southern Afghanistan, an area where Taliban fighters battling the Western-backed government continue to have strongholds.
The city was the powerbase of the former Taliban government, which was ousted from power in Afghanistan by US-led troops in 2001 and replaced with Karzai's Western-backed administration.
PHOTO CAPTION
Rubbles caused by Tuesday's explosion are seen in the city of Kandahar province, south of Kabul, Afghanistan, Wednesday, Aug. 26, 2009.
Al-Jazeera