Other boats docked on the river banks, including large tourist boats, were shining their lights onto the river, likely in search of survivors.
The search and rescue efforts were being carried out under heavy rainfall.
Index.hu reported that one person was rescued near the Petofi Bridge, which is about three kilometres south of parliament.
‘Hableany’ is described on the company’s website as «one of the smallest members of the fleet … an excellent venue for cruises and smaller family events.»
It has two decks and capacity for 60 people, or 45 for sightseeing cruises.