`` Witnesses say he looked calm . 2 children , 1 adult injured in knife attack at home , Belgian Interior Ministry says . Three people were seriously injured in attack in town of Dendermonde . Attacker ` ` had painted face , '' local journalist tells CNN .
2 children , 1 adult injured in knife attack at home , Belgian Interior Ministry says . Three people were seriously injured in attack in town of Dendermonde . Attacker ` ` had painted face , '' local journalist tells CNN .