(CNN) -- Authorities have made a second arrest related to a series of arsons in the Coatesville, Pennsylvania, area, the Chester County Arson Task Force said late Thursday.

Roger Leon Barlow is one of two people arrested in suspected arsons around Coatesville, Pennsylvania.

Mark Gilliam, 20, of West Chester, Pennsylvania, was arrested Thursday on a federal charge of attempted arson in the town of Thorndale on January 25, authorities said.

Gilliam was arrested at his residence without incident, according to the task force.

Gilliam is expected to have his initial appearance on Friday in U.S. District Court in Philadelphia, Pennsylvania.

Roger Leon Barlow, 19, of Downingtown, Pennsylvania, was arraigned Thursday afternoon on charges that he is responsible for several of the 23 suspected arsons in and around Coatesville since January 1, said Chester County District Attorney Joseph Carroll. Watch authorities announce his arrest "

He is charged with "arson and related offenses" in connection with at least nine of the fires. Among them was a spree that destroyed 15 homes in late January,

His bail was set at $9 million.

Special agent Mark Porter of the multi-agency task force that has been investigating the fires said the group is still investigating the other blazes and will "continue our efforts until everyone is brought to justice ... and we can bring some sense of peace to the city."

The task force would not comment on a possible motive, but Carroll said he does not suspect Barlow of a hate crime, classified as targeting an individual group or gang-related activity.

What are the answers to this following set of questions:

1. how much was Roger's bail set as?
2. how many were arrested?
3. where have the arsons been happening?
4. who is the other person arrested?
5. how old is he?
6. where was he arrested?
7. when was Roger arraigned?
8. how old is he?
9. how many homes were destroyed?
10. when?
11. Who is Mark Porter?
12. when is gillam's initial appearance?
13. when was he arrested?
1. $9 million
2. two people arrested
3. around Coatesville, Pennsylvania
4. Mark Gilliam
5. 20
6. in the town of Thorndale
7. Thursday afternoon
8. 19
9. 23
10. in late January
11. Special agent
12. Friday
13. Thursday