ROME (AFP) - European governing body UEFA are concerned about the state of preparations for Euro 2012 which is to be jointly held by Ukraine and Poland, the organisation's chief Michel Platini has said.

"We have tried to give them a wake-up call and we will see how things are progressing in a few months time after June," he told La Repubblica newspaper.

The French footballing legend has already issued a warning to both countries at the end of January over a lack of progress and told them that they had to avoid falling behind in building the necessary infrastructure.

Amid fears that they will be unable to build on time the new stadiums, motorways and rail network it needs to host the championship, Polish Prime Minister Donald Tusk in February announced an extra 100 million euros (158 million dollars) in financing.

Later Friday, Tusk and Ukrainian Prime Minister Julia Timochenko said they were confident that their countries could stage a successful tournament.

"I am 100-percent convinced that we will succeed," said Tusk at a joint news conference with Timochenko in Kiev.

Timochenko added: "I think we are going to be able to show in June the progress which will satisfy all the organisers of Euro 2012."