Twitter has approached TikTok's Chinese owner ByteDance to express an interest in buying its US operations, according to reports.

Axar.az reports citing foreign media that video-sharing platform TikTok has been at the centre of fierce debate in recent weeks and takeover talk.

Last week US Donald Trump ordered firms to stop doing business with TikTok within 45 days over security concerns.

Tech giant Microsoft is the front-runner to buy TikTok but now Twitter has emerged as a possible suitor.

But it remains unclear whether Twitter can afford to buy TikTok from its Chinese owners and can complete a deal within the 45-day window, according to sources quoted in the Wall Street Journal.