Chance the Rapper dropped four new songs on Thursday, including one in which he announces his purchase of local news website Chicagoist and calls for Chicago Mayor Rahm Emanuel's resignation.

In the song I Might Need Security the 25-year-old artist raps: 'I bought the Chicagoist just to run you racist b*****s out of business.'

Chance has long been vocal about social issues in his native city, lending his influence to social causes including police brutality, funding for the arts and public school quality.

In the chorus of the new song the rapper says: 'Rahm, you done! / I'm expectin' resignation / An open investigation on all of these paid vacations for murderers' - referring to police officers who are suspended rather than fired for misconduct.

Chance the Rapper, left, released four new songs on Thursday, including one in which he calls for the resignation of Chicago Mayor Rahm Emanuel, right. The 25-year-old artist born on Chicago's South Side has been openly critical of Emanuel's response to police brutality

In the track I Might Need Security Chance announces that he bought hyperlocal news site Chicagoist, which has been dormant since last November

Chance criticized Emanuel last year after the mayor proposed a $95million program to train police officers following a US Justice Department ruling that Chicago cops used excessive force against black residents.

In November, the rapper addressed the city council and suggested the funding should instead be allocated toward public schools and mental health programs.

Emanuel walked out during that speech.

Chance, whose real name is Chancelor Bennett, is the son of a Democratic political aide who worked for future president Barack Obama.

Last year he donated $1million for Chicago public schools amid a government funding crisis in a dispute with the Republican governor of Illinois, Bruce Rauner - who gets called out in I Might Need Security.

The song also blasts the Chicago Sun-Times for labeling him a 'deadbeat daddy' in a story about a child support dispute last year.

In addition to I Might Need Security Chance released Work Out, Wala Cam and 65th And Ingleside on Thursday.

Chance debuted I Might Need Security, Work Out, Wala Cam and 65th And Ingleside on Thursday, announcing their release on Twitter (above)

Chance also issued a statement about the purchase Thursday calling Chicagoist 'an integral local platform for Chicago news, events and entertainment'.

He has declined to comment on specific details of the acquisition, but said in the statement: 'I look forward to relaunching it and bringing the people of Chicago an independent media outlet focused on amplifying diverse voices and content.'

Chicagoist was part of a network of city-oriented websites including New York's Gothamist that were abruptly shuttered last November by publisher Joe Ricketts, a conservative mogul who also owns the Chicago Cubs baseball team, after staff voted to unionize.

New York public radio station WNYC - which bought Chicagoist, Gothamist and the other assets - confirmed Thursday that Chance had bought the hyperlocal site.

'We are delighted that the Chicagoist assets are finding a new home in the hands of a proud Chicagoan,' New York Public Radio president and CEO Laura Walker said in a news release Thursday.

'WNYC has a strong commitment to local journalism and building community, and we are pleased that these assets will be used to support local coverage in the great city of Chicago.'