Altaf Khan (38), a contractor from Mumbra, was nabbed yesterday while Mohammed Naseer Ansari (42), who is a real estate agent from Ambernath, was held today, police said.
Khan was produced before a local court today, which remanded him to police custody till March 13.
The two were involved in the murder conspiracy, said a crime branch official.
"Both were near the crime spot in two vehicles. The accused followed the shooters till the spot, in separate vehicles as per their plan," the official said adding that one of vehicles, which belonged to Khan, was seized.
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Loharia, (50), was gunned down by two assailants, who came on bike, outside his office at Vashi in Navi Mumbai on February 16. Locals had caught one of the assailants, Venkatesh Shettiar, who was arrested from the spot, while the other, Qureshi, was later arrested from his home at Mumbra town in Thane district.
During the course of investigation, former encounter cop Emmanuel Amolik was arrested for allegedly ordering the killing of the builder at the behest of absconding prime suspects Suresh Bijlani, who is a builder, and architect Anil Garg, both of whom are absconding now.