IS media channels offline for a day!

The Islamic State group's online propaganda channels went mysteriously quiet for more than a full day between Wednesday and yesterday, in what analysts said was an "unprecedented" silence.

IS, which uses messaging application Telegram to broadcast daily updates on military operations and claims of attacks, published nothing between 0900 GMT on Wednesday and 1001 GMT on Thursday.

Charlie Winter, senior research fellow at the International Centre for the Study of Radicalisation and Political Violence, called the silence "unprecedented."

IS's Telegram channels usually post more than a dozen messages each day, ranging from multilingual radio broadcasts on battlefield achievements to pictures of civilian life in the group's self-styled "caliphate."

On Wednesday, however, the group posted in a brief 30-minute window, skipping its usual "daily broadcast" entirely.

It then went dark until yesterday, breaking its silence with a four-minute radio segment on operations in eastern Syria and Iraq, only in Arabic.

"IS media infrastructure has taken a real battering over the last few months and because of that, something is changing," Winter said.