A message posted on a jihadist website on Sunday promised that “terrible” attacks will soon strike the US, France, Denmark and other European countries.

“Where will the next strike by Al-Qaeda be?” a message on the Ansar al-Mujahidin network read, followed by: “The house of disbelief: America, France, Denmark and other countries in Europe, and in the countries that helped and help France and other places.”

The message threatened attacks that will be “strong, serious, alarming, earth-shattering and terrible,” which will be carried out both collectively and individually.

The post also singled out France, telling the country to prepare for a “long war of attrition.”

The threats against France may be connected to the French military’s recent operation in Mali against pro-Al-Qaeda militants.

The commentators on the forum praised the message, and said they hoped to “hear the news of these strikes soon.”

The Ansar al-Mujahidin network is a well-known jihadist forum that has previously published messages affiliated with Al-Qaeda and its supporters. In April 2012, the NYPD launched an investigation into a 3-D image posted on the forum that said Al-Qaeda would soon return to New York City.