(CNN) The Harvard-Yale football game was delayed Saturday after more than a hundred students and alumni flooded the field to protest against the schools' endowments from fossil fuel companies.

"Nobody wins. Yale & Harvard are complicit in climate injustice," read a banner held by the students.

The student protest delayed the 136th edition of the Harvard-Yale game on Saturday.

Harvard was leading Yale 15-3 during the game in New Haven, Connecticut when the students ran into midfield as halftime was ending. The game was delayed for nearly 30 minutes until students were escorted out of the field by police.

The Harvard-Yale football game has been delayed due to students protesting climate change in the middle of the field. pic.twitter.com/uY9Kc3Mn32 — ESPN College Football (@ESPNCFB) November 23, 2019

Students are calling for both schools to divest their endowments from fossil fuel holdings. Yale students are demanding the school to pressure hedge fund managers to cancel any debt from Puerto Rico.

"Harvard and Yale claim their goal is to create student leaders who can strive toward a more 'just, fair, and promising world' by 'improving the world today and for future generations.' Yet by continuing to invest in industries that mislead the public, smear academics, and deny reality, Harvard and Yale are complicit in tearing down that future," the student groups, Fossil Fuel Divest Harvard, Fossil Free Yale and Yale Endowment Justice Coalition , said in a statement following the protest.

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