Ferrari Formula 1 driver Kimi Raikkonen has been given an official reprimand for an infringement when leaving the pitlane during the second Friday practice session ahead of the Bahrain Grand Prix.

Both Raikkonen and Mercedes driver Lewis Hamilton crossed the white line demarking the two lanes in the pits to cut behind a Sauber that had just emerged from the garage.

The FIA stewards, including ex-grand prix driver Mika Salo, deemed that Raikkonen's driving had been unsafe, leading to the Ferrari driver earning his first reprimand of 2015.

"The driver of car 7 drove in a potentially dangerous manner when leaving the pitlane," said the stewards' statement.

This was deemed to be in contravention of article 30.13 of the sporting regulations, which states that "at no time may a car be driven unnecessarily slowly, erratically or in a manner which could be deemed potentially dangerous to other drivers or any other person."

AUTOSPORT understands that there will be no action against Hamilton, although there has been no official communication of this despite the fact he was stated to be under investigation alongside Raikkonen.

"I don't really know too much about it," said Hamilton after the session. "The rule is that you do your starts on the left and allow people to pass on the right.

"I saw Kimi was kind of blocked because there was a car coming out of the garage so Kimi went around him and I followed.

"I just went to the right. As far as I am aware, it was legal."