Iceland

Belly landed for unknown reason 27 km from Akureyri. No casualties.
Source & photo:
http://aviation-safety.net/database/record.php?id=19440807-2

During the take off run, the aircraft swung, veered off runway and collided with a truck. No casualties.

While on a survey flight off the north coast of Iceland, the four-engine aircraft was shot down by two USAAF P.38 Lightning and crashed into the Greenland Sea off the Grimsey Island. All seven crew members took refuge in a dinghy and were later rescued while the aircraft sank and was lost.
Crew (I/KG40):
Karl Holtrup,
Günter Karte,
Josef Teufel,
Herbert Richter,
Emil Brandt,
Wilhelm Lehn,
Siegfried Klinkmann.
Source: http://aviation-safety.net/wikibase/wiki.php?id=78787

An undercarriage collapsed on landing at Reykjavik Airport. The aircraft slid on runway for several yards before coming to rest. While all occupants were unhurt, the aircraft was considered as damaged beyond repair.

The aircraft left RAF Bovingdon on a transatlantic flight to the US with an intermediate stop in Keflavik. While descending to the airport, the crew encountered poor weather conditions with rain falls, low ceiling and a near zero visibility. At an altitude of 1,100 feet and a speed of 139 knots, the aircraft hit a rocky peak with its right wing. It crashed on a mountain slope located southeast of Keflavik and was totally destroyed, except the tail. Fourteen occupants were killed and only the tail gunner survived with minor injuries. At the time of the accident, the captain was reducing his altitude in an attempt to establish a visual contact with the ground.
Crew (93rd Squadron):
Cpt Robert H. Shannon, pilot,
Lt Gen Frank Maxwell Andrews, copilot,
S/Sgt George A. Eisel, tail gunner,
Cpt James E. Gott, navigator,
T/Sgt Kenneth A. Jeffers, radio operator,
S/Sgt Lloyd C. Weir, crew chief,
S/Sgt Paul H. McQueen, air gunner.
Passengers:
Adna W. Leonard,
Br Gen Charles A. Barth,
Col Marlow Krum,
Col Frank L. Miller,
Maj Theodore C. Totman,
Lt Col Fred A. Chapman,
Maj Robert H. Humphrey,
Cpt Joseph T. Johnson.

After touchdown at Reykjavik Airport, the four-engine aircraft was unable to stop within the remaining distance. It overrun and came to rest. There were no casualties.

Crashed on take off for unknown reason. No casualties.

Shortly after take off from Reykjavik Airport, while on a transit flight from Europe to the US, the engine number three caught fire and exploded. The crew attempted to return for an emergency landing. On final approach, the engine number three fell off and the aircraft landed in flames. On touchdown, the right main gear failed and the aircraft skidded for several hundred yards before coming to rest with both wings on fire. Nine crew members were killed while six others were injured.
Crew (120th Squadron):
W/O P. L. B. Ellis, pilot, †
F/S J. G. Benson, copilot, †
F/S G. Lowrison, radio navigator, †
Sgt D. McClelland, flight engineer,
F/S A. Barthorpe, wireless operator and air gunner,
Sgt G. Young, wireless operator and air gunner,
Sgt W. Stanfield, wireless operator and air gunner. †
Passengers:
Cdr C. Harris,
Lt A. Finn,
S/L H. Catchlove,
F/O W. Wright, †
F/L F. H. Salt, †
LAC M. I. Kidd, †
Cpl H. Y. Mills, †
Cpl J. D. Cole. †

The four engine airplane was shot down by the pilots of two USAAF P-38 Lightning and crashed in Arnarvatnsheiði. All seven crew members were killed.

The four engine aircraft was shot down by the pilots of a USAAF P.38 and a Curtiss P-40 and crashed into the sea some 15 km west of Reykjavik. All six crew members were killed.
Crew (I./KG 40):
Ofw Fritz Köhn,
Ofw Philipp Haisch,
Ofw Ottmar Ebener,
Uffz Wolgang Schulze,
Ofw Artur Wohlleben,
Ofw Albert Winkelmann.