Seven children are reported to have been killed by an improvised bomb explosion in Togo. Witnesses said they were woken by a loud blast late on Saturday in the Savanes region in the north of the country. “An investigation is ongoing to determine the circumstances of this explosion and identify the perpetrators,” the army is quoted as saying in a statement on Sunday. The BBC reports Islamist militants linked to Islamic State and al-Qaeda have attacked numerous targets in a string of countries in the Sahel.