KABUL — Afghanistan was reeling on Tuesday from a brazen Taliban assault on a military base in the country’s east a day earlier that killed at least 45 people and wounded as many as 70, most of them military personnel, according to provincial officials.

There were fears, however, that the death toll from the daytime assault on the base, which also serves as a training center for a pro-government militia and is run by the country’s intelligence service, was even higher.

The attack began when a suicide bomber first drove a Humvee into the base in eastern Maidan Wardak province and detonated his load as he rammed the vehicle into the main building there, according to Khawanin Sultani, a council member.

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The building collapsed from the explosion, which likely contributed to the high casualty numbers.

The Taliban, who promptly claimed responsibility in a statement to the media just hours after the attack, later said in a separate statement that they had met again on Monday with US representatives to discuss “ending the invasion of Afghanistan.” The talks in Qatar, where the Taliban have a political office, were to continue on Tuesday.

The deadly attack, one of the worst Taliban assaults on Afghan forces in recent years, and the Qatar meeting that was meant to pave way for peace talks aimed at resolving Afghanistan’s 17-year war underscored the audacity of the insurgents in the face of stepped-up US peace efforts.

The Taliban, who now hold sway in almost half of Afghanistan, carry out attacks on a daily basis, mainly targeting the country’s beleaguered security forces.

The base that was hit is located on the outskirts of Maidan Shar, the provincial capital, about 40 kilometers (25 miles) from Kabul. Sultani said that after the Taliban bombing, four other attackers engaged in a shootout with Afghan troops and that all the attackers were killed.