Has 'terrorist summer' started?

An unknown gunman shot and wounded five teens in a playground in New York's Brooklyn at around 17:00 local time (around midnight Moscow time). Police said that five teens, ages 15 to 18, were hospitalized with non-life-threatening injuries. There have been no arrests yet, the police have launched an investigation, TASS reports. Another incident took place in the Paris suburb commune of Magnanville. A French police officer have been killed in knife attacks by an unknown assailant. The 42-year-old police commander was in plain clothes when he was stabbed to death as he arrived home in the evening. The attacker then entered the house and held hostage the commander’s wife.