"First of all, our goal is the implementation of the (synchronization) project, not the memorandum as such. Basically, our key goal is to launch a formal connection procedure, which means that we have to submit an application for technical conditions," Vaičiūnas said at a news conference.

"The political memorandum is also focused on that goal. Thus, this (signing) is unlikely to occur this week. It should occur later. But, basically, the planned work and preparations for the application are ongoing," he said.

The minister said that the memorandum might be signed "at the junction of autumn and winter".

According to Vaičiūnas, the countries disagree on how many lines to Poland are needed. Lithuania maintains that the existing LitPol Link interconnector between Lithuania and Poland is sufficient, but Estonia insists on a second line to be built to ensure a higher level of security.