Knife attacker slashes man in London metro 'terror incident'

By James Davey LONDON (Reuters) - A man wielding a knife slashed a man in an east London metro station on Saturday, reportedly screaming "this is for Syria", before police used a stun gun to detain him in what they described as a terrorist incident. A pool of blood near the ticket barriers at the Leytonstone Underground station, about 6 miles (10 km) east of central London, was visible in footage posted on Twitter that also showed the suspect confronting officers at just after 1900 GMT. "We are