BAGHDAD — The killings of three U.S. soldiers in separate attacks in Baghdad pushed the American death toll for April up to 47, making it the deadliest month since September, the military said today.

One soldier died when his vehicle was struck by a roadside bomb. The other died of wounds sustained when he was attacked by small-arms fire, the military said. Both incidents occurred Tuesday in northwestern Baghdad.

A third soldier died in a roadside bombing Tuesday night in the east of the capital, the military said.

The statement did not give a more specific location. But the eastern half of Baghdad includes embattled Sadr City and other neighborhoods that have been the focus of intense combat between Shiite militants and U.S.-Iraqi troops for more than a month.

In all, at least 4,059 members of the U.S. military have died since the Iraq war started in March 2003, according to an Associated Press count.

The latest fighting erupted at the end of March after Prime Minister Nouri al-Maliki launched a crackdown against Shiite militias in the southern port city of Basra. But it quickly spread to Baghdad's Sadr City.

The militiamen have used the district as a base to fire barrages of missiles and mortar rounds at the U.S.-protected Green Zone which houses much of the Iraqi government.

KABUL, Afghanistan — The plot to kill President Hamid Karzai over the weekend was hatched in lawless tribal areas of Pakistan, the Afghan intelligence chief said today.The accusation came just hours after Afghan security forces raided a Kabul hide-out of militants with suspected links to the attack on Karzai. Seven people died in the raid.Intelligence chief Amrullah Saleh said there was no evidence that Pakistan's government or its intelligence agencies were involved in the assassination attempt Sunday."We have no evidence whether ... the operation has had any mercy or go-ahead from the government of Pakistan and (its) special agencies," Saleh told reporters in Kabul. "There (is) very, very strong evidence suggesting that Pakistan's soil once again has been used to inflict pain on our nation."The militants involved in the weekend plot were in phone contact with people in Pakistan's Bajaur and North Waziristan tribal areas and the city of Peshawar, he said.Pakistan army spokesman Maj. Gen. Athar Abbas said the allegation that the attack on Karzai had its roots in Pakistan's tribal areas appeared "baseless."Afghanistan often accuses Pakistan of harboring leaders of the Taliban insurgency against Karzai's government, although Pakistan denies it.