Nigeria death toll exceeds 150

More than 150 people were killed in a series of co-ordinated attacks by a radical Islamist sect in north Nigeria's largest city, according to an internal Red Cross document seen Sunday by an Associated Press reporter.

Nigeria's President Goodluck Jonathan also arrived in Kano on Sunday afternoon to pay his condolences, as military helicopters flew overhead.

A spokesman at Murtala Muhammed Specialist Hospital in Kano, the city's largest hospital, declined to immediately comment Sunday on the latest count. But the toll of the attacks could be seen all around.

Armed police drove by the hospital in a pickup truck with a corpse wrapped in a white burial shroud. Children outside the hospital sold surgical masks. Once used only for the heavy dust in this sprawling city, the masks are now being used by responders going into the hospital's overflowing mortuary.

Soldiers in bulletproof vests carrying assault rifles with bayonets stood guard at roundabouts in areas where the sect had attacked. At the regional police headquarters in Kano, which sustained particularly heavy damage, soldiers refused access to AP reporters.

'The Secretary-General is appalled at the frequency and intensity of recent attacks in Nigeria, which demonstrate a wanton and unacceptable disregard for human life.' UN Secretary-General Ban Ki-moon

Friday's attacks by Boko Haram hit police stations, immigration offices and the local headquarters of Nigeria's secret police in Kano, a city of more than 9 million people that remains an important political and religious centre in the country's Muslim north.

The co-ordinated attacks represent the extremist group's deadliest assault since beginning its campaign of terror in Africa's most populous nation.

UN Secretary-General Ban Ki-moon condemned the multiple attacks, according to a statement.

"The Secretary-General is appalled at the frequency and intensity of recent attacks in Nigeria, which demonstrate a wanton and unacceptable disregard for human life," the statement said.

Ban also expressed "his hope for swift and transparent investigations into these incidents that lead to bringing the perpetrators to justice," according to the statement.

A Boko Haram spokesman using the nom de guerre Abul-Qaqa claimed responsibility for the attacks in a message to journalists Friday.

He said the attack came because the state government refused to release Boko Haram members held by the police.

President Goodluck Jonathan also condemned the attacks. But Jonathan's government has repeatedly been unable to stop attacks by Boko Haram, whose name means "Western education is sacrilege" in the Hausa language of Nigeria's north.

Boko Haramhas carried out increasingly sophisticated and bloody attacks in its campaign to implement strict Shariah law and avenge the deaths of Muslims in communal violence across Nigeria, a multiethnic nation of more than 160 million people.

Authorities blamed Boko Haram for at least 510 killings last year alone, according to an AP count, including an August suicide bombing on the UN headquarters in the country's capital Abuja. So far this year, the group has been blamed for at least 219 killings, according to an AP count.

Boko Haram recently said it specifically would target Christians living in Nigeria's north, but Friday's attack saw its gunmen kill many Muslims. In a recent video posted to the Internet, Imam Abubakar Shekau, a Boko Harm leader, warned it would kill anyone who "betrays the religion" by being part of or sympathizing with Nigeria's government.

Also Sunday, police say 11 people were killed in an attack in Nigeria's north state of Bauchi.

Bauchi state police commissioner Ikechukwu Aduba said the attack happened overnight. He said the 11 dead included civilians, police and army personnel who were running a checkpoint. Aduba said at least two churches were also attacked in a separate incident in the state.

He did not immediately name who was responsible for the attacks. Bauchi is also a region where Boko Haram has staged attacks before. It is nearly320 kilometres from Kano.