Europe

French police march silently to honor IS attack victims

  • Police officers and residents walk with a banner reading "Homage to the two slain colleagues Jessica and Jean-Baptiste" during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)

    Police officers and residents walk with a banner reading "Homage to the two slain colleagues Jessica and Jean-Baptiste" during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)  (The Associated Press)

  • Police officers  and residents walk to pay homage to the two slain police officials during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)

    Police officers and residents walk to pay homage to the two slain police officials during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)  (The Associated Press)

  • A French police officer holds a rose and an candle to pay homage to the two slain colleagues during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)

    A French police officer holds a rose and an candle to pay homage to the two slain colleagues during a white march in Mantes-la-Jolie, west of Paris, Thursday, June 16, 2016. French police officials Jean-Baptiste Salvaing and his companion Jessica Schneider were killed Monday by an Islamic State extremist. (AP Photo/Kamil Zihnioglu)  (The Associated Press)

Hundreds of police, friends and neighbors have marched silently through a Paris suburb to honor two police officials killed by an extremist claiming loyalty to Islamic State, as authorities question suspected accomplices.

Their faces solemn and lips closed, the crowd marched Thursday from Mantes-la-Jolie, where victim Jessica Schneider worked as a police administrator, to Magnanville, where she and police commander Jean-Baptiste Salvaing were stabbed at their home Monday night.

Their 3-year-old son survived the attack, which rattled France's leadership as the country is on high alert for new extremist violence. Attacker Larossi Abballa was killed in a police raid.

Three people with links to Abballa are in custody and being questioned by anti-terrorism investigators.

French police have described growing fear after multiple attacks targeting security officers.