ISLAMABAD: The roars celebrating the re-election of US President Barack Obama on television give Mohammad Rehman Khan a searing headache, as years of grief and anger come rushing back.

The 28-year-old Pakistani accuses the president of robbing him of his father, three brothers and a nephew, all killed in a US drone attack a month after Obama first took office.

“The same person who attacked my home has gotten re-elected,” he told Reuters in the capital, Islamabad, where he fled after the attack on his village in South Waziristan, one of several tribal areas near the Afghan border.

“Since yesterday, the pressure on my brain has increased. I remember all of the pain again.”

In his re-election campaign, Obama gave no indication he would halt or alter the drone program, which he embraced in his first term to kill Al Qaeda and Taliban militants in Pakistan and Afghanistan without risking American lives.

Drone strikes are highly unpopular among many Pakistanis, who consider it a violation of sovereignty that causes unacceptable civilian casualties.

“Whenever he has a chance, Obama will bite Muslims like a snake. Look at how many people he has killed with drone attacks,” said Haji Abdul Jabar, whose 23-year-old son was killed in such a bombing.

Analysts say anger over the unmanned aircraft may have helped the Taliban gain recruits, complicating efforts to stabilise the unruly border region between Pakistan and Afghanistan. That could also hinder Obama's plan to withdraw US troops from Afghanistan in 2014.

Obama authorised nearly 300 drone strikes in Pakistan during his first four years in office, more than six times the number during the administration of George W. Bush, according to the New America Foundation policy institute.

Since 2004, a total of 337 US drone strikes in Pakistan have killed between 1,908 and 3,225 people.

The institute estimates around 15 per cent of those killed were non-militants, although that percentage has declined sharply to around one to two per cent this year. Washington says drone strikes are very accurate and cause minimal civilian deaths.

The Pakistani government says tens of thousands of Pakistanis have been killed in the fight against the Taliban insurgency. Many were civilians caught in suicide bombings. Others were killed by the Pakistani army.

Hard to secure data on drone attacks

Getting accurate data on casualties and the effects of drones is extremely difficult since the government allows few foreigners into the tribal areas and the Taliban often seal off the sites of strikes.

While the aerial campaign has weakened Al Qaeda, its ally, the Pakistani Taliban, remains a potent force despite a series of Pakistan army offensives against its strongholds in the northwest.

Seen as the biggest security threat to the Pakistani government, the Pakistani Taliban have been blamed for many of the suicide bombings across Pakistan, and a number of high profile attacks on military and police facilities.

“We are amazed that Obama has been re-elected. But for us there is no difference between Obama and Romney; both are enemies. And we will keep up our jihad and fight alongside our Afghan brothers to get the Americans out of Afghanistan,” said Pakistan Taliban spokesman Ehsanullah Ehsan.

On Thursday, a suicide bomber rammed the gates of a paramilitary base in Karachi, killing at least one soldier and wounding more than a dozen people.

Pakistanis were largely indifferent in the run-up to Tuesday's election, expecting little change to the drone attacks regardless of whether Obama or Republican challenger Mitt Romney won.

“Any American, whether Obama or Mitt Romney, is cruel,” said Warshameen Jaan Haji, whose neighbourhood was struck by a drone last week, told Reuters on the eve of the election. “I lost my wife in the drone attack and my children are injured. Whatever happens, it will be bad for Muslims.”

For Khan, the Feb 2009 drone attack on his home left him as the main provider for 13 surviving family members, forcing him to move to Islamabad and work with a real estate company.

“When the Sandy hurricane came, I thought that Allah would wipe away America,” he said. “America just wants to take over the world.”