Her brother Showik Chakraborty was also called by the Central Bureau of Investigation (CBI) for the fourth day in a row for questioning in the case, the official said.
Rhea Chakraborty and her brother reached the DRDO guest house at Kalina in Santacruz, where the probe team is stationed, around 10.30 am, he said.
A Mumbai Police vehicle escorted the car in which the two arrived at the guest house, he said.
Rajput’s manager Samual Miranda and domestic help Keshav also reached the guest house in the morning.
Earlier, Rhea Chakraborty was questioned for nearly 10 hours on Friday and allowed to return home under police escort as a large number of media personnel were present outside her building. She was quizzed for around seven hours on Saturday.
Her brother is being questioned by the CBI since Thursday.
Rajput (34) was found hanging in his flat in suburban Bandra on June 14.
Rhea Chakraborty had been earlier questioned by the Mumbai Police in the case. The Enforcement Directorate has also quizzed her in a related money laundering case.