A man entered a school in Sweden today and killed a teacher with what appeared to be a sword.
The masked man wounded several others before he was shot by police.
The suspect is now being treated at a hospital， and police say they don′t why the man attacked those people.
Police say they don′t know his motive.
The BBC reports the injured are two students and another teacher， who′s in surgery.
According to witnesses， hundreds of students fled the building screaming.
Prime Minister Stefan Lofven is expected to arrive there sometime Thursday.
Lofven said everyone the victims， students， staff， and community must receive the support they need.
He called the attack a black day for Sweden.

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