Unofficial sources said that 25 police and civilians sustained injuries by the attack.
The attack involved at least five Taliban, one of whom blew himself up at the entrance to the site in the city of Gardez to clear the way for the others. "Five of our policemen have embraced martyrdom and 10 more have been wounded", he said.
His description of the assault suggested a well-prepared and coordinated assault.
However, according to Reuters, a spokesman for the United States military command in Kabul denied reports by an Afghan official that Americans had been killed, but confirmed that an unspecified number of soldiers had been wounded at Camp Shaheen, which is the headquarters of the Afghan army's 209th Corps in the northern city of Mazar-i-Sharif.
However, the Taliban have claimed credit for the shooting.
Taliban spokesman Zabihullah Mujahid has claimed responsibility for the attack in a statement sent to the media.
Another blast occurred inside the police compound when a second suicide bomber detonated his explosive vest, AP reports, citing local police official Sardar Wali Tabasim.
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And earlier this year, Taliban fighters dressed as Afghan soldiers stormed Camp Shaheen, killing more than 160 people at the base in northern Afghanistan. Last Saturday, an Afghan commando fatally shot three US soldiers and wounded a fourth during a joint U.S.
Camp Shaheen is home to Afghan National Security Defense Forces' Women's Participation Program.
A statement on the Resolute Support Twitter feed Saturday says the seven were wounded when an Afghan army soldier opened fire. The U.S. has around 8,400 troops now deployed to the country. "Mattis has repeatedly stressed that increasing the number of USA troops in Afghanistan would take place within a broader, long-term strategy for stabilizing Afghanistan", the Post reported. They mainly serve in a training and advisory capacity.
Islamabad said Afghanistan had formed three different investigating groups to probe the incident.
"The matter has been raised with the relevant Afghan authorities, who have informed that all efforts were in hand to probe the incident".
Further complicating the picture are questions about how to deal with neighboring Pakistan and balance separate fights against Afghan and foreign-based insurgents.
Afghan security forces inspect the exterior of a vehicle after a suicide bomb blast in Paktia Province, Afghanistan June 18, 2017.
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