Three mechanics are to be questioned on suspicion of manslaughter by a judge investigating the Madrid plane crash that killed 154 people in August.

The judge has called two mechanics who checked the plane before it took off and crashed, as well as Spanair's head of maintenance at Madrid's Barajas airport.

The first official report into the passenger jet crash, released this month, said investigators were focusing on a problem with the plane's wing flaps and the failure of a cockpit alarm to sound.

Spanair flight JK 5022 was bound for Las Palmas in the Canary Islands on August 20, but came down during or shortly after take-off.

The plane landed in a field and the resultant fire meant many victims had to be identified by DNA. Nineteen children were killed.

Some survivors were flung into the air and landed in a nearby stream, which saved them from being burned alive in the wreckage.