We're hearing that layoffs at Citigroup began yesterday and are continuing today. No word yet on how many heads have rolled, but earlier reports suggested the numbers could reach 20,000, and our tipster says it’s a "bloodbath." After the losses they reported earlier this week, this can't have been a surprise to anyone at the bank. But here's something that must have come as a shock: Citigroup was due to give out bonuses next week, and now we're hearing those who were canned won't get to partake. Representatives for Citibank said they'd call us back, but they haven't yet, so … developing!

UPDATE: Ok, so it's true: The first round of layoffs has begun. A Citigroup spokesman declined to comment specifically on the number of people laid off in New York or in any area, but during its earnings call this week the company indicated that in the fourth quarter, the bank would shed around 4200 employees worldwide. So far, those who've been sacked have been primarily in markets and banking. Regarding bonuses, Citi says that they're scheduled to be doled out in the next week or so, but again wouldn't comment specifically on if and how the newly unemployed would be affected. Some reports have said that company-wide, employees will receive stock instead of cash. Which, as someone but we can't remember who pointed out, is kind of like Arby's giving you a bunch of hamburgers instead of a paycheck.

Earlier: Vikram Pandit Gets a Write-down, Foreign Capital for His Birthday