A suicide car bomber set off a huge blast Saturday at a hospital in eastern Afghanistan.

The explosion in Logar province, about 40 kilometers from the capital, Kabul, caused heavy casualties, but Afghan authorities gave conflicting estimates. Hours after the attack, officials said they think the blast killed about 20 people, including women and children, and wounded dozens of others.

The Afghan Health Ministry had initially reported up to 60 people were dead and 120 wounded.

The Taliban says it did not carry out the attack, and that its fighters do not target hospitals. The militant group is active in eastern Afghanistan, attacking Afghan and coalition forces, and suicide attacks are one of its tactics.

The NATO coalition says one of its service members was killed by insurgents Saturday in eastern Afghanistan, apparently in a separate attack.

Earlier, authorities in northern Afghanistan said a bicycle bomb that exploded in a bazaar late Friday killed 10 people, including one police officer.

About 24 people, including five women and another policeman, were wounded by the blast in the Khanabad district of Kunduz province.