DUBAI, United Arab Emirates (AP) — Bahrain released radar tracks on Tuesday it said showed Qatari fighter jets passing by Emirati commercial airliners bound for the island nation, encounters which set off a new dispute pitting Qatar against the Gulf nations that have been boycotting it since last summer. The two alleged fly-bys on Monday morning could further escalate tensions between Qatar and the four Arab nations, among them the UAE, home to the world's busiest international airport.