HELSINKI, April 29 (Reuters) - Finland's Nokian Tyres on Monday posted a bigger operating loss for the first quarter than analysts had expected following its exit from Russia, citing negative impact from the Red Sea crisis and political strikes in Finland.

The tyre maker's operating loss increased to 26.2 million euros ($28.07 million) from a loss of 18.8 million in the year-ago quarter, missing the average forecast of a 9.1 million euro loss expected by 9 analysts in a poll provided by the company.

"The negative financial impact of the political strikes and the Red Sea crisis is approximately 20 million euros in EBITDA, of which more than half in Q1," Chief Executive Jukka Moisio said in a statement. ($1 = 0.9334 euros) (Reporting by Anne Kauranen, editing by Terje Solsvik)