April 17 - British journalist John McCarthy is kidnapped in Beirut (released in August 1991) - 3 others are found dead; Revolutionary Cells (RZ) claims responsibility in retaliation for the U.S. bombing of Libya.
April 26 - In Ukraine, one of the reactors at the Chernobylnuclear plant explodes, creating the world's worst nuclear disaster. 31 are killed directly by the incident, many more die from cancer in later years, many thousands more are exposed to significant amounts of radioactive material, and vast territories in Ukraine and Belarus are rendered uninhabitable.
June 19 - American college basketball player Len Bias suffers a fatal cardiac arrhythmia from a cocaine overdose less than 48 hours after being selected 2nd overall by the Boston Celtics in the 1986 NBA Draft.
August 19 - Two weeks after it was stolen, the Picasso painting Weeping Woman is found in a locker at the Spencer Street Station in Melbourne, Australia.
August 31 - The cargo ship Khian Sea departs from the docks of Philadelphia, Pennsylvania, carrying 14,000 tons of toxic waste. It will wander the seas for the next 16 months trying to find a place to dump its cargo.
September 13 - A magnitude 6.0 earthquake rocks the city of Kalamata in southern Greece, killing 20 people, injuring 80 and completely destroying one fifth of the city
October 22 - In New York CityWNBC Radio's traffic helicopter crashes into the Hudson River killing traffic reporter Jane Dornacker. The last words heard on-the-air were Dornacker's screams of terror, "Hit the water! Hit the water! Hit the water!"
October 26 - Bus deregulation goes into effect in the United Kingdom, except Greater London and Northern Ireland.
October 28 - In London, Jeremy Bamber is found guilty of the murder of his parents, sister and twin nephews and sentenced to life imprisonment with a recommendation by the trial judge that he should serve at least 25 years before being considered for parole.