Deadly attacks Tuesday at the Brussels airport and a metro station in the city are the latest in a string of attacks in Europe in recent years.

The owner of a passport found near the body of a suicide bomber in the attacks on Paris passed through a migrant corridor known for its lax controls and ease in obtaining transit documents as a flood of asylum-seekers surges toward Western Europe.

People around the world watch the skies to observe a rare celestial event, as a lunar eclipse coincides with a so-called "supermoon".

Each year, dozens of women from the poorer corners of eastern Europe are lured to travel to western Europe for sham marriages with men who pay large sums because they want to live, work or claim benefits more easily in their chosen country and move freely within Europe.

At least 14 migrants are killed after being hit by a train on a well-trodden route across Macedonia to Western Europe, police say.