On Thursday, local media reported that hundreds of people had taken to the streets of city of Baltimore for the fifth day in a row, calling for justice for Gray.
The Baltimore Police Department announced through its twitter account that two persons had been arrested as result of the demonstration, after activists reportedly confronted the police during major protests outside the Western District police station.
However, Hogan stressed, that local law enforcement agencies will proceed to play a primary role in handling the protests.
The newspaper reported, citing a police spokesman, that 32 troopers with expertise in crowd control had been deployed at the request of the city authorities and had already arrived in Baltimore.
On April 12, Gray, 27, was detained by police at a known spot for drug dealing, on a street in the west side of Baltimore, and placed in a police van. When the van arrived at the police station it was discovered that Gray was suffering from a severe spinal injury and could not talk. He was hospitalized and died a week later, on April 19.
Gray's arrest and death sparked numerous protests in Baltimore. Over the weekend, people took to the streets to protest police brutality and racial profiling in demonstrations similar to those seen in Ferguson, St. Louis, following the death of unarmed black teenager Michael Brown who was killed by white police officer Darren Wilson in August 2014.
According to the Killed By Police website, Gray was the 348th person killed by US police or who died while in police custody since the beginning of 2015.