The bomber blew up an explosives-laden minibus at the entrance to the camp in Chahar Asyab district, killing the four special forces members and wounding another three, the Defence Ministry said in a statement.
A USA serviceman was killed by a Taliban auto bomb on Thursday, which Trump cited as the catalyst for the abrupt end to talks.
President Donald Trump pledged to hit the Taliban "harder" than ever as America marked the 18th anniversary on Wednesday of the 9/11 attacks that led the country into war in Afghanistan.
Trump was joined by First Lady Melania Trump at the ceremony, during which a Navy bell tolled 184 times as the names were read off of the 184 who lost their lives lost when American Flight 77 slammed into the building's west front at 530 miles per hour on September 11, 2001. "One was jihad and fighting, the other was talks and negotiations", he said.More news: Hundreds of Nigerians board plane to leave South Africa
India's Permanent Representative to the United Nations Syed Akbaruddin said on Tuesday that the country preferred direct talks between the Afghanistan government and the Taliban terrorist group, PTI reported. Trump has cited the death of a US service member in one of those blasts as the reason why he now calls the US-Taliban talks "dead".
He said that over "the last four days", U.S. forces have "hit our enemy harder than they have ever been hit before and that will continue".
"If Trump wants to stop talks, we will take the first way and they will soon regret it".
"They thought that they had to kill people to put themselves in a little better negotiating position", Trump told White House reporters on Monday, Sept. 9, calling the attack "a big mistake".More news: Mugabe's body heads back to divided Zimbabwe for burial
Relatives of victims, survivors, police officers, firefighters and city leaders held a ceremony on Wednesday at Ground Zero where hijacked Al-Qaeda planes brought down the Twin Towers.
"We had two ways to end the occupation in Afghanistan".
"Al Qaeda still exists, so do the Taliban".
Trump was to meet Afghan President Ashraf Ghani and senior Taliban leaders on Sunday last week at his Camp David retreat after nine rounds of talks between the USA and Taliban representatives, held in Doha, the capital of the Gulf state of Qatar. Some 14,000 U.S. troops remain in the country, a fraction of the peak of about 100,000 in 2010.More news: Kentucky on guard as illnesses tied to vaping spreads