"We are operating in an asymmetrical environment where our convoys, our camps, our troops are attacked on a regular basis," MINUSMA chief El-Ghassim Wane said.
Investigators found the body of a man, IEDs and propane tanks in the aftermath of an explosion in a Massachusetts apartment building.
The Pentagon identified three U.S. Marines killed in Afghanistan on Monday after their convoy was attacked by a Taliban militant driving a car rigged with explosives.
Authorities in Des Moines confirmed that the IED was legitimate but did not release why it was built.
The Pentagon on Wednesday identified the U.S. service members killed in central Afghanistan this week by a roadside bomb in what is the deadliest day for American forces so far this year.
The bomber died and three employees were injured by the blast, which investigators are treating as an act of terrorism.
Pentagon officials identified the U.S. service member killed in Afghanistan on Friday amid a top general indicating significant Afghan losses during a "difficult and bloody summer."
The military-grade flares can be purchased at civilian sites like Amazon.
The U.S. military command in Kabul said it was investigating the reports.
Five officers were killed by sniper fire during a peaceful protest in downtown Dallas.
The situation for Afghanistan's civilians remains dire, with deaths and injuries from combat up by nearly a quarter