Sauber has fallen behind once again with its full salary payments to its 300 staff in Switzerland.

Boss Monisha Kaltenborn was not in Bahrain last weekend, amid reported talks with potential buyers and rumours that cash flow problems could shortly end the struggling Hinwil-based team's 23-year Formula 1 adventure.

Now, a month after similar reports about the February payments to staff, newspaper Neue Zurcher Zeitung claims that Sauber has once again fallen behind for March.

Team spokesman Robert Hopoltseder confirmed: "The worries of the last few weeks are not off the table. We currently live from hand to mouth."

The team's Marcus Ericsson and Felipe Nasr finished 12th and 14th respectively at Sunday's Bahrain Grand Prix.