Some 2,200 people had joined a social media campaign in Austria by Friday afternoon to organise a convoy of private cars and vans on Sunday to help pick up hundreds of migrants stranded in Hungary.
A 32-year-old man has been sentenced to life imprisonment for the brutal murder of a transgender asylum seeker in Vienna in January.
The 71 refugees found dead in an abandoned lorry in Austria last week most likely suffocated soon after they were picked up by a smuggler in Hungary, police said on Friday.
Update: Hundreds of refugees have set off on foot from Budapest's main railway station, planning to walk to Austria after the Hungarian authorities suspended international train services.
A hiker made a grisly discovery in the Kaunergrat mountain range in Tyrol on Wednesday - a lower leg dressed in a hiking boot and sock. It's thought the body part may belong to a German skier who went missing in the region in December.
One of the suspected drivers of the truck found abandoned in Austria with the decomposing bodies of 71 migrants inside has denied knowing there was anyone on board, as a Bulgarian court remanded him in custody.