Accident: Iran F100 at Tehran on Mar 19th 2019, main gear did not extend

An Iran Air Fokker 100, registration EP-IDG performing flight IR-215 from Qeshm Island to Tehran Mehrabad (Iran) with 24 passengers, needed to land at Tehran Mehrabad’s airport with both main gear struts not extended at about 21:30L (18:00Z). The aircraft came to a stop on its nose gear and aft belly. There were no injuries, the aircraft sustained substantial damage.

Metars:
OIII 191930Z 29006KT 9999 FEW035 BKN100 08/00 Q1015 A2998=
OIII 191900Z 28008KT 9999 FEW035 SCT100 08/M00 Q1015 A2999 NOSIG=
OIII 191830Z 27008KT 9999 FEW035 SCT100 10/M00 Q1015 A2998=
OIII 191800Z 00000KT 9999 FEW035 11/M04 Q1015 A2998=
OIII 191730Z 00000KT 9999 FEW035 BKN090 11/M05 Q1015 A2998=
OIII 191700Z 30004KT 9999 FEW035 BKN100 12/M05 Q1015 A2998 NOSIG=
OIII 191630Z 31004KT 9999 FEW035 BKN100 12/M05 Q1015 A2998=
OIII 191600Z 26008KT 9999 FEW035 SCT100 12/M04 Q1014 A2997 NOSIG=
OIII 191530Z 27006KT 9999 FEW035 SCT100 12/M04 Q1014 A2996=
OIII 191500Z 26008KT 9999 FEW035 SCT100 13/M05 Q1014 A2996=

The aircraft seen after landing: