Sollecito stopped near border
Earlier Friday, Italian authorities stopped Sollecito near the border with Austria and Slovenia, Italian police told CNN.
Sollecito, who is not allowed to leave Italy while the legal process continues, was halted in the northern Italian town of Udine, police said.
The Slovenian border is less than 20 miles east of Udine, and the border with Austria lies about 55 miles to the north.
Prosecutors said the couple killed Kercher, a British student, in November 2007. Sollecito was sentenced to 25 years in prison. Both denied murder.
Kercher, 21, was found partially nude in a pool of blood in the house she shared with Knox in the picturesque town of Perugia, where both women were exchange students.
But despite years of courtroom battles over her death, many aspects of the crime still remain unexplained.