ISLAMABAD (AP) -- Pakistan is holding 700 suspected militants without charges under a controversial law that has been criticized by human rights groups, the country's attorney general said Thursday.
The attorney general's admission, made during a Supreme Court hearing, will likely fuel concerns about Pakistan's conduct during the past several years as it battled a domestic Taliban insurgency in the country's northwest.
The suspected militants are being held in internment centers in the country's semiautonomous tribal region along the Afghan border -- an area that is the main Taliban sanctuary in the country, Attorney General Irfan Qadir said.
They will be held until the military concludes operations against the Taliban, and then authorities will determine whether they can be tried in court, said Qadir. He justified the detention under a law passed in 2011 known as the Actions (in Aid of Civil Power) Regulations.
"It's a war-like situation there," said Qadir. "While the operation is on, their status will remain the same."
Amnesty International criticized the law in a December report, saying both it and colonial-era regulations in the tribal region "provide a framework for widespread human rights violations to occur with impunity."
The London-based rights group said the Pakistani military regularly holds people without charges and tortures or mistreats them in custody. It said some detainees do not survive and their bodies are returned to their families, or dumped in remote areas.
The Pakistani military called the report "a pack of lies."
At a court hearing on Monday, a lawyer for Pakistan's most powerful intelligence agency said the agency had held seven suspected militants sought by the Supreme Court for more than a year and a half without sufficient evidence to try them.
Raja Irshad, a lawyer for the Inter-Services Intelligence agency, which is controlled by the army, told the court that officials held the men because they were convinced they were "dangerous people and involved in terrorism."
The seven men were among 11 suspected militants captured in connection with a 2007 suicide bombing against ISI personnel and a rocket attack a year later against an air force base. An anti-terrorism court ordered them to be freed in May 2010, but they were picked up again near the capital, Islamabad. Four died in custody under mysterious circumstances.
The ISI produced the seven surviving men in court last February in response to a judicial order prompted by their relatives, who were looking for them. Two of the men were too weak to walk. Another wore a urine bag. In a meeting with their families on the court premises, they complained of harsh treatment during their detention.
Supreme Court Chief Justice Iftikhar Mohammad Chaudhry told the attorney general that the men should be tried in a court of law or released if there isn't sufficient evidence. His remarks seemed to challenge the constitutionality of the new law.
"We don't want them to be released if they are criminals or militants," said Chaudhry. "They should be tried under law, and you cannot keep them in custody illegally."
The court ordered officials from the tribal region to produce a detailed report about the evidence against each suspect when the hearing resumes on Jan. 28.
The Supreme Court also has been pressing the government on a case involving allegations of corruption against Prime Minister Raja Pervaiz Ashraf. He has denied the allegations. The chief justice ordered the government's anti-corruption chief, Fasih Bokhari, to arrest Ashraf last week, but he refused, citing lack of evidence.
The case took a strange turn at the end of last week when one of the anti-corruption officials working on the case, which involves alleged kickbacks for the construction of private power stations, was found dead, hanging from a ceiling fan in a government lodge in Islamabad.
The police are treating Kamran Faisal's death as a suicide, but his family has raised doubts.
The chief justice ordered a judicial probe into Faisal's death on Wednesday.
On Thursday, the two-judge panel ordered officials to provide video footage from the security cameras at the government lodge where Faisal was found. They also ordered Pakistan's telecommunications authority to provide a record of Faisal's calls and summoned relevant officials to appear before the court on Jan. 28.
Also on Thursday, a bomb planted in a hollow concrete block killed four people, including two police officers, in the southern city of Karachi where there has been a surge of violence. Ten other people were injured, said senior police officer Alilm Jaffery. He said the victims responded to a report of an explosion near a garbage bin and then were killed by the second blast after they reached the scene.
Associated Press writer Adil Jawad in Karachi contributed to this report.