Blasts kill at least 20 in northeast Nigeria: police

By Ahmed Kingimi MAIDUGURI, Nigeria (Reuters) – Blasts have killed at least 20 people in northeast Nigeria, police said, while residents said the toll was even higher in the largest attack for weeks in a region blighted by the Islamist militant Boko Haram insurgency. Security in Nigeria has become a major challenge for President Muhammadu Buhari, a former military ruler whose 2015 election win was largely due to his vow to crush Boko Haram. Buhari has said he will seek a second term.