Attacker of 2015 Jerusalem gay march plotted another attack

Women take part in the annual gay pride parade in central Jerusalem, Thursday, July 21, 2016. Thousands of people waving rainbow flags marched through downtown Jerusalem Thursday in the city's annual gay pride parade in a defiant show of force a year after an extremist ultra-Orthodox Jew stabbed a 16-year-old girl to death at the march. (AP Photo/Ariel Schalit) (The Associated Press)

Israeli police officers watch as people take part in the annual gay pride parade in central Jerusalem, Thursday, July 21, 2016. Thousands of people waving rainbow flags marched through downtown Jerusalem Thursday in the city's annual gay pride parade in a defiant show of force a year after an extremist ultra-Orthodox Jew stabbed a 16-year-old girl to death at the march. (AP Photo/Ariel Schalit) (The Associated Press)

People take part in the annual gay pride parade in central Jerusalem, Thursday, July 21, 2016. Thousands of people waving rainbow flags marched through downtown Jerusalem Thursday in the city's annual gay pride parade in a defiant show of force a year after an extremist ultra-Orthodox Jew stabbed a 16-year-old girl to death at the march. (AP Photo/Ariel Schalit) (The Associated Press)

Israeli police say an extremist ultra-Orthodox Jew in prison for a deadly attack on last year's annual Jerusalem gay pride march has plotted another attack on this year's march.

Police spokeswoman Luba Samri says Thursday that police thwarted the plot by Yishai Schlissel and arrested his brother, Michael, as an accomplice.

Schlissel is serving a life sentence for his 2015 stabbing spree. He killed a 16-year-old girl and stabbed seven other people. He had been released from prison weeks earlier after serving a sentence for stabbing several people at the 2005 pride march.

Police would not say how Schlissel plotted an attack from inside prison. Police briefly detained other relatives of Schlissel and ordered them to stay away from the march.

This year's march in Jerusalem will be heavily secured.