Rapper Nas has been hit with a massive $2.5 million demand from U.S. tax officials, according to reports.

The hip-hop star is accused of failing to keep up with his taxes in 2006 and 2007, and Internal Revenue Service (IRS) officials have taken their case to court in a bid to recoup the cash.

IRS bosses allege Nas failed to pay $2,584,206, according to papers obtained by TMZ.com.

In July Nas was ordered to pay $5,000 a month in child support for his son Knight as part of his ongoing divorce battle with estranged wife Kelis.

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(This news article provided by World Entertainment News Network)