Twitter's landlord in London has sued the US short message service for outstanding rent payments.
Crown Estate, which manages properties for the British Crown, said on Tuesday it had filed a complaint in a court in the British capital that Twitter was guilty of renting office space in a building near Picadilly Circus.
Twitter initially did not respond to the request.
Twitter was bought by Elon Musk, one of the richest people in the world, in October.
He paid $44 billion.
Musk then laid off around half the workforce and is said to have also stopped rent payments.
The San Francisco Chronicle reported Monday that San Francisco has also filed a lawsuit against Twitter over $6.8 million in outstanding rent payments for December and January.
The British newspaper "Daily Telegraph" reported on Tuesday that Twitter signs and logos had been removed from the London office.
However, a member of the workforce said the company was still based there.