A suicide bomber in the eastern Pakistani city of Lahore has killed at least 20 people and wounded 60, most of them police officers.
A suicide bomber in the eastern Pakistani city of Lahore has killed at least 21 people and wounded 60, most of them police officers.
The explosion targeted a group of police gathered outside the High Court building, officials said.
The bomber targeted a group of police gathered outside the High Court building ahead of an anti-government protest, officials said.
A number of people - police and civilians - were seen lying motionless in the street.
He blew himself up after being approached by police.
The attack comes amid extreme political tension following the assassination of opposition leader Benazir Bhutto.
The attack comes amid extreme political tension following the assassination of opposition leader Benazir Bhutto.
Bodies on ground
The blast happened just before noon local time (0700 GMT), when the courts are at their busiest.
The police officers were gathering outside the court building ahead of a protest by lawyers against the rule of President Pervez Musharraf.
Television footage showed a scene of devastation in the area in front of the High Court.
Police officials said that the bomber blew himself up when police asked him to stop.
"The explosion was horrible and a number of people, including police officers, were lying dead on ground," a passer-by, Tariq Javed, told the BBC.
"I was in the court when the blast went off. It was a big bang," lawyer Syed Zulfiqar Bokhari told the Reuters news agency.
There was no immediate claim of responsibility.
"I saw bodies of policemen lying on the ground," he said.
Police constable Jameel Ahmed told the Reuters news agency that the attacker was a young man who had arrived outside the court on a motorbike.
There was no immediate claim of responsibility for the attack.
2007 ATTACKS 27 Dec: Opposition leader Benazir Bhutto and 20 people killed in suicide attack in Rawalpindi21 Dec: At least 50 dead in a suicide attack on a mosque in north-western Pakistan24 Nov: Twin suicide car bombings kill at least 30 in Rawalpindi19 July: More than 40 killed in three separate bomb attacks across the country14 July: 24 soldiers killed in suicide attack on a military convoy in north-western Pakistan28 April: Suicide bomber kills at least 22 people at a rally in North-West Frontier Province
"He parked his bike and walked to the police and blew himself up," Mr Ahmed said.
Police said the explosion was timed to cause maximum damage.
City police chief Malik Mohammad Iqbal said that all but one of the victims were policemen.
The officers were gathering outside the court building ahead of a protest by lawyers against the rule of President Pervez Musharraf.
Pakistan has seen a massive rise in suicide bombings since 2007.
According to the Interior Ministry, the country was hit by over 50 suicide attacks last year, which claimed at least 3,000.
Government officials had warned of an increased risk of attacks in Lahore ahead of the Shia Muslim holy month of Moharram, which starts on Friday.
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