Secret memos show Pakistan 'knew of US drone strikes'
US drone strikes often spark angry protests in Pakistan
Secret US documents reveal that senior Pakistani government officials have for years known of and endorsed CIA drone strikes, an American newspaper reports.
The Washington Post obtained CIA documents and Pakistani diplomatic memos which indicate officials were routinely given classified briefings.
Analysts have long suspected Pakistan gave tacit consent for such strikes despite publicly condemning them.
Pakistan's PM Nawaz Sharif has urged US President Obama to halt such attacks.
"I also brought up the issue of drones in our meeting, emphasising the need for an end to such strikes," Mr Sharif said after they met on Wednesday.
The attacks by unmanned US aircraft have been a critical source of tension in the relationship between the countries and came up amid wide-ranging talks between the leaders in Washington.
They are also deeply unpopular with the Pakistani public and Pakistan has consistently stated that they violate its sovereignty. The Pakistani government is yet to comment on the report.'Explicit arrangement'
The documents obtained by the newspaper focus on at least 65 drone strikes in Pakistan over the last few years and were labelled as "talking points" for regular CIA briefings.
Although they are marked "top secret", they are cleared for release to Pakistan, the paper reports.
The Washington Post says the documents provide a detailed timeline of the CIA drone programme "tracing its evolution from a campaign aimed at a relatively short list of senior al-Qaeda operatives into a broader aerial assault against militant groups with no connection to the 11 September 2001 attacks".
A spokesman for the Pakistani embassy in Washington did not respond to a request for comment from the newspaper and the CIA also declined to comment.
Correspondents say the files expose the explicit nature of the arrangement between the countries in the period when neither acknowledged that any drone programme even existed.
In 2010 the controversial whistle-blowing site Wikileaks released numerous documentsrelating to Pakistan which showed the Pakistani military and other arms of the government had "quietly acquiesced" with drone strikes even though they publicly condemned them.
In August 2008 then Prime Minister Yousuf Raza Gilani is reported to have said: "I don't care if they do it as long as they get the right people. We'll protest in the National Assembly and then ignore it."
But this latest cache includes documents which appear to refer to a direct Pakistani role in the selection of targets, with the newspaper referring to one 2010 entry describing hitting a location "at the request of your government".
There is also a reference to a "network of locations associated with a joint CIA-ISI targeting effort".Civilian casualties
The number of civilian casualties in these drone strikes has long been a source of dispute.
Local claims of civilian deaths are almost impossible to prove. One reason is the restricted media access in the region. The other is the militants' tendency to cordon off the targeted sites and conduct quick burials.
Earlier this week, Amnesty International released a report which said that CIA drone attacks in Pakistan are responsible for unlawful killings, some of which could amount to war crimes. The rights group named several victims who, it says, "posed no threat to life".
Amnesty said it reviewed nine of 45 recent drone strikes in the volatile tribal region of North Waziristan where many strikes have hit, and found a number of victims had been unarmed.
The US has defended its drone strikes in Pakistan and elsewhere. On Tuesday the White House said it takes "extraordinary care" to ensure they comply with international law and that they were a "course of action least likely to result in the loss of innocent life".
A recent UN report also found that US drone strikes had killed at least 400 civilians in Pakistan, far more than the US has ever acknowledged. Estimates by other groups such as the Bureau of Investigative Journalism calculate that between 407 and 926 civilians were killed in Pakistan.
The BBC's M Ilyas Khan in Islamabad says that the general impression one gets from talking to elders and correspondents from the tribal area is that drone strikes are for the most part accurate, causing fewer civilian casualties than some reports suggest.
Relations between Islamabad and Washington nosedived more than two years ago, when US special forces killed al-Qaeda leader Osama Bin Laden in a raid on his hideout in Abbottabad in north-west Pakistan, without giving the Pakistani government advance warning.
But in their meeting on Wednesday, Mr Sharif said the US and Pakistan "have travelled together as friends and allies in defence of freedom and the pursuit of international peace and security".