A knifeman killed his mother and sister in the Paris suburb of Trappes on Thursday and seriously wounded a third person, a French Interior Ministry source said.
Police said the 34-year-old German citizen wounded 10 people in the attack on Friday.
German police on Sunday said they had shot and injured a man who had rampaged with a knife through the Berlin Cathedral, and also said there were no signs the incident was politically motivated.
Police in France have foiled a suspected terror attack and arrested two brothers of Egyptian origin, French Interior Minister Gerard Collomb said on Friday.
A man killed a passer-by in a knife attack in the heart of Paris and injured four others before being shot dead by police, French authorities said.
The assailant "died on the spot" after the soldier opened fire, police spokesman Harald Soeros said, adding that the attack took place just before midnight local time.
Bangladeshi police arrested three men on Sunday as they investigate a knife attack on Zafar Iqbal, a popular author and professor of computer science and engineering.
A woman was killed and 12 other people injured after a man carried out a knife attack in a mall in a busy shopping district in the Chinese capital, Beijing, police said on Sunday. Beijing police said in a short statement they had detained a man over the early afternoon attack at the Joy City Mall in