At least seven people have been wounded following a knife attack in the city of Surgut, in central Russia, with police shooting the attacker dead.
Two police officers have been attacked by a man wielding a knife, but were unhurt, in the Belgian capital, Brussels.
A policeman has reportedly been injured, following a knife attack, at a police station, in the French city of Toulouse.
A suspected terror attack reportedly occurred at a church in Indonesia, after a man attacked a priest with a knife during a Sunday service, with no serious casualties, according to police.
At least six people have been injured, after an attack, by a man reportedly armed with a knife and flammable liquid, on a train in Switzerland.
At least one person has been killed, and a further five wounded, following a knife attack, in the UK capital, London.
At least 19 people have been killed, and a further 45 injured, following a knife attack, at a residential care centre, in Japan.
At least one person has been killed, and a further three wounded, after a knife-wielding man attacked rail passengers, at a station near Munich, in Germany.
Israeli police have reportedly shot and killed a man, who they say tried to stab one of the officers, in Jerusalem.
At least five police officers have been stabbed to death, following a knife attack, in far western China.