Police in the Czech Republic are hunting the murderer of four members of a family south of Prague.  Their prime suspect is an American from Palo Alto, California.

Authorities say the man is known as 20-year old Kevin Dahlgren on his social media accounts, and they released a photo taken from Facebook.

Czech media report that the suspect was an English teacher who had only recently moved to Brno, 200km (125 miles) southeast of the capital Prague.

He is believed to have set the house on fire after killing the family.  In fact, authorities discovered the bloodshed when they were called out to put out the house fire, realizing that “a violent crime had likely been committed there,” a spokesman for the firefighters said.

Two of the male victims were reportedly musicians in the amateur Ukulele Orchestra jako Brno.

Neighbors told local media that one of the murdered sons was under 18.