"I strongly condemn the attack on Holy Child Auxilium school. These kind of acts will not be tolerated," Kejriwal tweeted.

A senior police official said that the case is being investigated and also the footage of CCTVs installed in the school premises scanned.

Read More: Christian school vandalised in South Delhi

This is the sixth such attack on Christian institutions in the national capital since November last year.

In January, some unidentified groups had vandalised a church in Vasant Kunj sparking outrage among the Christian community which alleged that it is part of a "hate campaign".

After massive protests by Christian groups, Home Minister Rajnath Singh had tightened security around churches and other religious institutions.

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