Hours later, an explosion struck near the U.S. embassy in Kabul. The violence comes as Afghanistan faces presidential elections on Sept. 28.
He "found out the Taliban kill people" just before the anniversary of 9/11, one wag scoffed.
The Taliban took credit for a car bombing in Kabul as they and the U.S. engage in peace talks meant to reduce U.S. military presence in Afghanistan.
The attack against the Green Trend party headquarters lasted for hours and claimed the lives of at least 20 people.
Afghan forces and their allies were responsible for more than half of all civilian deaths in the first three months of 2019.
The military says three other service members and one American contractor were wounded during the explosion in Ghazni.
“There were soldiers lying everywhere and the smoke was so thick, it was difficult to see,” said a spokesman at the base.
An apparent electrical fault started the blaze.
Agence France Presse's Shah Marai was among nine journalists killed in a bombing as they covered an earlier explosion.
Ten journalists were killed in a series of attacks on Monday.
Eight journalists lost their lives covering the blasts after a suicide bomber attacked them.
The blast came after repeated warnings that militants could try to disrupt the country's election process.
The blast was the latest in a series to have hit Shi’ite targets in the Afghan capital.
The casualty toll is the worst since 150 people were killed in a truck bomb explosion last May.
Twenty five people were injured.
President Ashraf Ghani’s spokesman issued a statement calling the attack an “unpardonable” crime against humanity.
Officials say the attack was near a compound of Afghanistan’s national intelligence agency.
The militant group Islamic State claimed responsibility for the attack.