Former Maryland governor Martin O'Malley speaks on "Face the Nation" in 2011. (Photo by Chris Usher/CBS News via Getty Images)

Amid the unrest in Baltimore, former Maryland governor Martin O’Malley is cutting short a planned series of paid speeches in Ireland and returning home Tuesday morning, an aide said.

The Democrat, who has been aggressively positioning himself for a White House bid, had been scheduled to give several speeches Tuesday and Wednesday in Dublin. He was in London on Monday to give another paid address.

O’Malley served for seven years as Baltimore’s mayor before becoming governor of Maryland in 2007.

It was not immediately clear what role O’Malley would play upon his return. Looting and rioting broke out Monday shortly after the funeral for Freddie Gray, the 25-year-old who died in police custody from a severe spinal injury.

In a statement Monday night, O’Malley said he is “saddened that the city I love is in such pain this night.”

“All of us share a profound feeling of grief for Freddie Gray and his family,” O’Malley said. “ We must come together as one city to transform this moment of loss and pain into a safer and more just future for all of Baltimore's people."

O’Malley’s speeches, on topics including data-driven governance and renewable energy, were part of an effort to make money for his family before his expected formal entrance into the presidential race late next month.