A total of 53 were in use, Deputy Mayor Ambrus Kiss said at a briefing on Thursday, according to news site hvg.hu. Diesel units will replace the CNG buses.

With the new natural gas prices, the specific fuel cost per kilometer of CNG-powered vehicles will be 350% higher than that of diesel buses, at around HUF 500-550 per kilometer.

The 53 CNG vehicles in BKV's fleet could add up to HUF 1 billion a year to the fuel costs, which is why BKV has decided to stop using them for now, Kiss noted.

He added that these buses would not be mothballed for the whole year and that BKV is working on finding cheaper natural gas.