A firm that tracks cryptocurrency transactions says $33.8 million in the digital currency has been donated to Ukraine’s government and non-governmental organizations there since the start of Russia’s invasion, nearly a third of it on Tuesday, according to AP.

Chief Scientist Tom Robinson of Elliptic said most donations to date have been in bitcoin and ether. Some people are sending non-fungible tokens, or NFTs, to the Ukrainian government’s ethereum account.

Elliptic also warned of scammers tricking unsuspecting cryptocurrency holders wanting to donate to Ukrainian causes.

Elliptic is among firms that help law enforcement track cryptocurrency to combat money laundering.

Ukraine issued a plea for contributions on Twitter last week. To date, it has received 30,000 donations, including $5.8 million from Gavin Wood, the British programmer who co-founded ethereum. There have been several other donations of more than $1 million.