No survivors have been found from Aseman Airlines flight EP3704, which disappeared from radar on Sunday morning, around 45 minutes after taking off from Tehran on a domestic flight.
Russian experts probing the weekend plane crash outside Moscow which killed 71 people said the accident may have been caused by ice on speed probes which led to faulty information on the craft's airspeed.
Investigators scoured the scene Monday after a passenger plane crashed near Moscow minutes after take-off, killing all 71 people on board, in one of Russia's worst-ever plane crashes.
The Antonov An-148 plane operated by the domestic Saratov Airlines was flying to Orsk, a city in the Urals, and crashed in the Ramensky district on the outskirts of Moscow.
Eight other people on a C-2 Greyhound were rescued shortly after the aircraft crashed and transferred to USS Ronald Reagan.
The families of the missing sailors were notified after a C-2A "Greyhound" aircraft with 11 people on board went down on Wednesday around 930 kilometres southeast of Okinawa, the US Navy said.
The group had been flying from the town of Arusha to the Senegeti National Park on Wednesday morning when an "incident" caused the Cessna Caravan plane to crash near the Empakaai Crater, Coastal Aviation said.
A military F18 fighter plane crashed on the outskirts of Madrid on Tuesday killing its pilot, the Spanish Defence Ministry said.
A plane crash at a Swiss summer camp on Friday killed two 14-year-old campers and the pilot, while leaving a third teenager seriously injured, police said.
A US military plane crashed in rural Mississippi on Monday evening killing at least 16 people, a regional emergency management official said.
Myanmar search and rescue teams were pulling dead bodies from the sea off the country's southern coast Thursday after a military plane crashed with more than 120 people on board.