World News Update, what you need to know

Assailants loyal to Islamic State forced an elderly priest to his knees before slitting his throat and took several worshippers hostage in a French church.

ELSEWHERE:

TOKYO - One day before he tried to hand a letter to a top Japanese lawmaker offering to kill hundreds of disabled people, the suspect in Japan's worst mass killing in decades tweeted: "I don't know if it's right, but action is the only way."

STOCKHOLM - An unidentified assailant shot and wounded a man in a shopping mall in the Swedish city of Malmo, but police say the attack has nothing to do with recent Islamist militant violence elsewhere in Europe.

PHILADELPHIA - Hillary Clinton is set to become the first woman presidential nominee of a major US party, a historic moment that Democrats hope will help eclipse rancor between her supporters and those of her rival in the primaries, Bernie Sanders.

POTSDAM - A German man has been jailed for life for murdering two young children last year, including a four-year-old refugee boy whom he had kidnapped from Berlin's main migrant registration centre.

KRAKOW - Massive crowds of young people have gathered to start World Youth Day, an event hosted by the Catholic Church, in the Polish city of Krakow.