At least 70 people have been wounded in a suicide bombing and assault on Bagram Air Base north of capital Kabul.
"A suicide bomber wearing an explosive belt blew himself up close to stalls at the crowded Jamila market," said a senior police officer, who asked not to be named.
Police spokesman Basir Mujahid said the blast hit a vehicle carrying staff of Pul Charkhi prison.
The blasts came a day before the first anniversary of a truck bombing that left more than 500 dead in Mogadishu, the worst ever attack in Somalia which was blamed on militant group Al-Shabab.
A suicide attack claimed by the Taliban has killed three NATO Czech soldiers and wounded one US and two Afghan soldiers on a NATO foot patrol in eastern Afghanistan.
Daesh claimed responsibility for the attack, with provincial official Sohrab Qaderi saying, "most of the victims were children, who were working in a car wash close to the suicide bombing site."
Police Captain Farah Ismail said the death toll might rise. The attack took place at a market in the town of Wanlaweyn in the Lower Shabelle region killing at least 5 people and wounding another 10.
Health officials say at least 10 people were killed and over a dozen injured in the attack at a checkpoint in Kabul's Shia-majority area. Daesh has claimed responsibility for the attack.
There has been no claim of responsibility for the attack in Cameroon's Far North region, which is a routine target of Boko Haram suicide bombers.
President Trump said the US would "grieve and pray" for the victims, but added states that "sponsor terrorism risk falling victim to the evil they promote."
Daesh claimed responsibility for the attacks on parliament and Ayatollah Khomeini's tomb in the Iranian capital. Iranian officials say a third attack was thwarted by the anti-terrorism department.
It emerged that Istanbul was a mere transit stop for Salman Abedi before he flew to Europe. As this became known, Donald Trump promised to deal with security leaks that led to the bomber's name being leaked.
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