The Federal Aviation Administration plans to announce it is reducing flight arrivals at Washington Reagan National Airport to address safety concerns, after a deadly collision between a helicopter and an American Airlines regional jet killed 67 people,

According to an email sent to airlines, the FAA is temporarily reducing the number of planes that can arrive each hour at Reagan National Airport (DCA).

The Federal Aviation Administration is indefinitely reducing flights into Reagan National Airport from 28 to 26 arrivals an hour to address safety concerns after the deadly crash there last week, according to two individuals with knowledge of the decision who spoke on the condition of anonymity because they were not authorized to speak to the media.