Samuykta Kishan Morcha (SKM) who is spearheading the farmers' protests on Wednesday has announced a four-hour nationwide railway blockade on February 18.

"There will be a 'rail roko' across the country from 12 pm to 4 pm on February 18," the SKM said in the statement.

SKM also asserted that toll collection will not be allowed in Rajasthan from February 12 onwards.

Thousands of farmers have been protesting against the three agriculture laws which were enacted in September last year.