Bahrain released radar tracks on Tuesday it said showed Qatari fighter jets passing by Emirati commercial airliners on their way to the island nation, encounters which started a new dispute between the Gulf nations amid the diplomatic crisis gripping Doha , according to The Washington Post.

The two fly-bys on Monday morning could further escalate tensions between Qatar and the four Arab nations that have been boycotting it for months, among them the UAE , home to the world’s busiest international airport. They also could affect long-haul airline travel, as the region’s carriers are a crucial link between the East and West.

Emirati officials on Monday described the fly-bys as though the fighter jets “intercepted” their civilian aircraft. Qatari officials deny their jets intercepted the aircraft and on Tuesday dismissed the footage as “unauthenticated videos.”

Bahrain state television aired radar footage the broadcaster described as showing Emirates flight No. EK837 from Dubai flying toward Bahrain International Airport at 3,170 meters (10,400 feet). Two other radar signals the broadcaster described as Qatari fighter jets flew at around 2,590 meters (8,500 feet) and crossed briefly in front of the Emirates plane’s flight path. The radar screen briefly flashes orange text, likely a collision warning.

It wasn’t clear from the footage at what distance the fighter jets allegedly passed the Emirates flight, but Bahrain previously described the distance as being 3.2 kilometers (2 miles).

The broadcaster also aired footage of an aeronautical chart it said showed a Qatari fighter jet flying across the flight path of a just-passed Etihad airliner, both at 24,000 meters (8,000 feet). It identified the flight as ETD23B, which corresponds to Etihad flight No. EY371, a direct Abu Dhabi-Bahrain flight that took off Monday morning.