Media outlets in the Former Yugoslav Republic of Macedonia have reacted strongly to Bulgarian Prime Minister Boyko Borisov's comment on their country's judicial system.

In a controversial ruling on Monday, Macedonia's Supreme Court deprived Bulgarian mother Spaska Mitrova of custody over her daughter, prompting Borisov to warn the Macedonian authorities that his country will be "extremely strict" when the criteria are adopted for Macedonia's EU entry.

Macedonia's Capital daily has called the Bulgarian Prime Minister a "loser" over his statement.

"It seems that Borisov has nothing else to do besides coming up with statements about Macedonia and its Euro-Atlantic integration," the paper has commented, reminding that the Bulgarian Prime Minister recently declared he would not accept "Northern Macedonia" as Macedonia's potential new name.

Capital reckons that Borisov has intervened in the country's name dispute with Greece.

Citing Borisov's comment that the Spaska Mitrova case is a test in diplomacy, the paper claims he has already "failed the test."

Another daily, Utrinski Vestnik, claims that Spaska Mitrova is a "self-proclaimed" Bulgarian who tries to "internationalize" the issue for her own benefits.

In 2011, Supreme Court of Appeals in Macedonia's Skopje granted custody rights to Spaska Mitrova, who was thrown for three months in jail in 2009 for preventing her former husband from meeting their child.

The infant was taken away from the mother by force, following a series of contradictory court decisions.

The young woman holds a Bulgarian passport and perceives herself as Bulgarian. She was sentenced and served time in a Macedonian prison over charges she did not allow her husband to see Suzanna. She was released on parole, but then the parental rights case began.

Mitrova has been the cause of diplomatic scandal between the two countries since 2009.

In the aftermath of the news about the Court's rule in March 2009, the Bulgarian Foreign Affairs Ministry expressed deep concern over the way the custody trial was held, defining it as non-transparent and staged in the conditions of a very negative public environment, which included physical force, detention, and depriving the mother of her right to see her child.