A series of attacks on security forces in Pakistan has killed at least 38 people, officials say.
In Lahore, militants attacked offices of the Federal Investigation Agency (FIA), as well as two police training centres. At least 26 people died.
In the northern town of Kohat, 11 were killed in a car bomb attack on police.
Then a bomb in the city of Peshawar in the north-west killed a child. Suicide attacks in Pakistan in the past two weeks have killed more than 250 people.
The Peshawar car bomb went off outside a housing complex for government employees. A number of people were wounded.
Thursday's violence began in Lahore - Pakistan's second-largest city. It was long spared the brunt of Pakistan's unrest but has seen a number of attacks since the start of the year.
Four gunmen attacked the FIA building in the city, officials say.
At least seven people - including police and the attackers - were killed in the battle, officials said.
A police spokesman said: "We found grenades and a suicide jacket near one dead person. Two dead bodies have been found near the front gate. The building has been cleared and the employees are safe."
In March 2008, more than 20 people died in a suicide attack on an FIA building nearby.
Police and militants were also among the dead in Thursday's assaults on the other security facilities in Lahore.
One was the Manawan police training academy, where three of the attackers are said to have blown themselves up. Eight others died.
The academy had been targeted in March this year, in an attack that killed nearly 20 people.
'Guerrilla war'
The other training centre attacked on Thursday was the Bedian academy for commando troops.
Police say the situation is now under control at all three facilities.
Thursday's attack in Kohat saw a suicide bomber ram his car into the wall of the police station compound, police said, causing part of the building to collapse.
Eyewitnesses say that both civilians and policemen are among the dead.
Interior Minister Rehman Malik said: "The enemy has started a guerrilla war," reports AP news agency.
"The whole nation should be united against these handful of terrorists, and God willing we will defeat them."
The BBC's Aleem Maqbool in Islamabad says that although no group has yet claimed responsibility for the attacks the finger of blame will point towards the Taliban.
Just a couple of weeks ago they threatened a wave of attacks against security forces unless the army's operations against them came to an end.
Nadal is trying to win his fourth Masters 1000 title of the year |
Rafael Nadal and Novak Djokovic made swift progress into the quarter-finals of the Shanghai Masters as the event lost another two players to injury.
Top seed Nadal swept past Tommy Robredo 6-1 6-4 in the final match of the day, after world number four Djokovic had beaten Rainer Schuettler 6-4 6-2.
Nadal will next face Ivan Ljubicic, who led 11th seed Gael Monfils 6-2 3-0 when the Frenchman quit with a back injury.
Stanislas Wawrinka was 3-6 7-6 4-2 down to Radek Stepanek when he withdrew.
The Swiss was suffering with abdominal pains and joins Juan Martin del Potro, Andy Roddick and Tommy Haas as withdrawals during the week, while world number one Roger Federer (fatigue) and Britain's Andy Murray (wrist injury) had already skipped the tournament.
In Thursday's other matches, ninth seed Robin Soderling had a surprisingly comfortable
6-3 6-3 win over fifth seed Jo-Wilfried Tsonga and will next meet Feliciano Lopez, who defeated Jurgen Melzer 5-7 7-6 (7-3) 6-1.
Soderling is among a handful of players still in with a chance of claiming one of three remaining spots up for grabs at the ATP season-ending World Tour Finals in London next month.
"I know that if I play well, I have a chance, but this tournament won't decide who's going to play in London," said the Swede. "There's still a lot of tennis to be played."
Sixth seed Nikolay Davydenko beat 10th seed Fernando Gonzalez 6-3 7-5 to set up a clash with Stepanek.
Djokovic goes on to play eighth seed Gilles Simon, who beat Tomas Berdych 6-3 6-4.
"I've been working on physical strength and fitness a lot in last couple of months, and it's been paying off," said Djokovic.
"It's playing one of the key roles in the situations like this. When you are playing week after week, it's important to be physically strong, and that gives you advantage over your opponents."
Nadal was rarely troubled despite falling 2-0 behind in the second set against compatriot Robredo.
"I am playing well," said the Spaniard. "But I played two terrible games at the start of the second set so I have to improve in situations like this if I want to beat the top players."
Vendors from City Mall confront owners Wednesday in a bid to get the mall to lower its rents.
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