Police in Berlin have arrested a man over the disappearance of a four-year-old Bosnian boy, and said they found a child’s body in the suspect’s car.

The 32-year-old man was arrested yesterday morning following a tip-off from his family, police said in a statement.

They said they were still trying to confirm the identity of the dead child and would conduct an autopsy on the body.

Mohamed Januzi was last seen on October 1 leaving the central registration centre for migrants in Berlin with an unidentified man.

The following week, police published photos of Mohamed and a grainy video of a man leading the boy along a street. The case drew widespread attention in Germany.

On Tuesday, police posted new pictures of the boy and a clearer amateur video of the man in the hope of getting new leads.

Authorities also announced a reward of €20,000 for information and described the suspect as of European appearance, slim, with dark hair and a beard.

It is unclear how Mohamed became separated from his mother and siblings.

There have been long lines and frequent overcrowding at the registration centre this year as Germany is struggling to absorb a huge influx of refugees and other migrants coming in from Syria and other countries.