An Atlas Air Boeing 767-300ER Freighter operating as online retailer Amazon's Prime Air has crashed near Houston following a flight from Miami.

The aircraft (MSN 25865) operating Atlas Air flight 3591 "crashed into Trinity Bay near Anahuac, Texas, shortly before 12:45pm [local time] today", the US Federal Aviation Administration says in a statement.

There were three crewmembers aboard the flight, according to the regulator. FAA investigators are enroute to the crash site.

FlightRadar24 data shows the flight departed Miami at 11:33 local time and was scheduled to arrive at Houston Intercontinental at 12:53 local time.

The 767-300ER Freighter has flown for Prime Air since April 2017, Cirium Fleets Analyzer shows. It had 90,601h and 23,180 cycles at the end of December.

The aircraft was delivered new to Canadian Airlines International in 1992, the database shows. It was converted to a freighter by Atlas Air in 2016.

Atlas Air was not immediately available for comment.

Kazakhstan's Air Astana is set to lift its frequencies on its services to Tashkent starting 1 April.

Flights between Almaty and Tashkent will increase from daily to 10-times weekly, while Astana-Tashkent will rise from four-times weekly to six-times weekly.

The additional frequencies to Tashkent will be operated using Airbus A320s and Embraer 190s.

Cirium schedules data shows that Air Astana competes with Uzbekistan Airways on both routes.

Aegean Airlines is to three new destinations in Africa to its network this summer as part of an broader expansion.

The Greek carrier says it will add Marrakech and Casablanca in Morocco and Tunisian capital Tunis as destinations from Athens, along with Ibiza, Sarajevo, Skopje and Valencia. In addition, it will start flying from Thessaloniki to Hannover.

Cirium schedules data shows that Ryanair already serves Marrakech from Athens.

Aegean also plans additional frequencies from Athens to Barcelona, Berlin, Dusseldorf, Hamburg, Lisbon, Madrid, Munich, Porto, Vienna and Zurich as well as, in the summer, to Bologna, Catania, Luxembourg, Malaga, Malta, Naples and Venice.

The Greek flag carrier says the addition of 700,000 international seats to its network will bring the total to 10.3 million.

Domestic seats bring the overall total to 17.7 million.