URK, Netherlands—Rioting youths protesting on the first night of a Dutch curfew torched a coronavirus testing facility and threw fireworks at police in a Dutch fishing village. Police said Sunday they fined more than 3,600 people nationwide for breaching the curfew that ran from 9 p.m. Saturday until 4:30 a.m. Sunday and arrested 25 people for breaching the curfew or for violence. Video from the village of Urk, 80 kilometers (50 miles) northeast of Amsterdam, showed youths breaking into the COVID-19 testing facility near the village’s harbor before it was set ablaze Saturday night. The police and municipality issued a statement Sunday expressing their anger at rioting, “from throwing fireworks and stones to destroying police cars and with the torching of the test location as a deep point.” “This is not only unacceptable, but also a slap in the face, especially for the local health authority staff who do all …