Several people have been arrested in the Tel Aviv bus bombing that injured 21, Israeli authorities announced on Thursday. A handful of Palestinians from the West Bank and an Arab individual with Israeli citizenship were taken into custody for Wednesday’s bombing, which injured at least 20 people and is being considered a terrorist attack. Shin Bet, Israel’s internal security service, said the suspects were arrested within hours of the bombing. It was the first attack in Tel Aviv in six years. The names of the suspects haven’t been released.