The government of Nigeria sues pharmaceutical company Pfizer for $6.95-billion in damages.
- The Supreme Court rules that Nigerian families can sue drug company Pfizer for using a deadly antibiotic on their children.
- Gunmen kill 11 worshipers in St Phillip's Catholic Church in the town of Ozubulu in Nigeria's Anambra State.
- Three suicide bombers kill 27 people and wound 83 near Maiduguri, Nigeria.
- Boko Haram insurgents ambush an oil exploration team in the Magumeri area of Borno State, Nigeria, killing at least 69 people.
- Nigerian officials report, as a result of negotiations, Boko Haram has released an estimated 82 schoolgirls who were among about 220 kidnapped from a secondary school in Chibok in Borno State in April 2014.
- At least 36 people are dead after two buses crash on the Lagos-Ibadan Expressway in Nigeria.
- Because of a nationwide shortage of intravenous sodium bicarbonate (i.e., baking soda solution), United States hospitals are rationing its use in heart surgery, chemotherapy, for patients whose blood is too acidic, and as an antidote to certain poisons. The two primary producers, Amphastar and Pfizer, indicate that supplies will not increase until late June.
- Nigerian spy chief Ayo Oke has been suspended by President Muhammadu Buhari after anti-corruption agents uncovered more than $43 million in cash at his flat in Lagos.
- Over the last week, a meningitis outbreak has killed at least 140 people in Nigeria.
- Multiple suicide blasts occur at a refugee camp near Maiduguri, Nigeria, leaving eight people dead and wounding 18 others.