Officials and politicians in Serbia on Sunday condemned Podgorica's decision to ban ceremonies marking the 100th anniversary of the unification of Serbia and Montenegro.
Serbian President Aleksandar Vucic said he doesn't understand the decision, which he said prohibits people in Montenegro from "thinking differently and having a different view of the past".
Both Croatia and Montenegro have said they are discussing the possibility of halting arms exports to Saudi Arabia in the wake of the death of dissident journalist Jamal Khashoggi, but neither has made a decision yet.
The OSCE South east Europe Media Conference, meeting in Struga, Macedonia, on Thursday adopted a declaration condemning the attack on Montenegrin Vijesti journalist Olivera Lakic, and called on the authorities in Montenegro to ensure that the investigation is independent, effective and speedy and that the perpetrators, including its masterminds, are brought to justice.
"Montenegro is at this moment as well with the United Kingdom and supports its efforts to defend its sovereignty and security for its citizens," the Montenegrin government said on Twitter.
Skripal and his daughter were found last week in an unconscious state on a bench in the town of Salisbury.