Nearly two months after American Airlines flight 5342 collided with a helicopter, leading to 67 fatalities, the National Transportation Safety Board has provided an update on the investigation.

Helicopters should not be allowed to travel over a four-mile stretch over the Potomac River following the deadly air collision near Washington in January, according to urgent safety

Helicopters should be barred from a four-mile stretch over the Potomac River when flights are landing on Reagan National Airport’s Runway 33, National Transportation Safety Board Chair Jennifer Homendy said as the NTSB unveiled “urgent safety recommendations” after the deadly mid-air collision in January.

The National Transportation Safety Board plans to issue a preliminary report on Tuesday into the Jan. 29 collision between a helicopter and an American Airlines jet that killed 67 people near Washington Reagan National Airport.