The victims were said to be a 15-year-old Senior Secondary School 1 pupil and 19-year-old.
Punch Metro gathered that the children lived with their father in the Ketu area of the state.
Sometime in 2015, Lasisi allegedly raped the elder sister, who fled home after the incident.
The mother was also said to have separated with the plumber because of the incident and relocated, leaving the pupil and her 10-year-old sister in Lasisi’s care.
A Punch correspondent learnt that Lasisi, who was arrested on Wednesday after the victim raised the alarm, started having sex with the pupil last year.
A police source at the Lagos State Police Command, where the suspect was transferred to, disclosed that the victim said Lasisi gave her N500 each time he had sex with her.
“The girl is currently at the Mirabel Centre for medical tests. She said her father had had sex with her three times and that she tried to resist the harassment. He gave her N500 each time he had sex with her.
“Her mother fled home two years ago when he raped the girl’s elder sister. The whereabouts of the other victim had yet to be known.
“But the suspect is still denying that he raped them even though her daughter insisted he did,” the source said.
The Lagos State Commissioner of Police, Fatai Owoseni, on Thursday at the command’s headquarters in Ikeja, confirmed Lasisi’s arrest, adding that the two cases were being investigated.
He said, “The suspect was arrested for defiling his daughters. The elder one ran away and he continued to serially molest the younger one. The suspect will be paraded after the completion of investigation.”
Meanwhile, a student of Adeniran Ogunsanya College of Education, Ijanikin, Lagos State, Michael Emeka, has confessed to belonging to Aiye Confraternity, saying he spent part of his school fee to mark his initiation into the group.
Twenty-five-year-old Emeka said apart from drinks he bought with the school fee, he also paid N25,000 to cement his membership of the group.
Punch Metro learnt that Emeka, who had been on the wanted list of the police, was trailed to a place in Ijanikin sometime in February 2017.
He was eventually tracked down on the premises of the Nigerian Foreign Service Academy on the Lagos-Badagry Expressway, while charms and a locally-made pistol were recovered from him.
The Imo State indigene told Punch that he got the charms from the cult leader to fortify himself against gunshots.
He said, “I was initiated into the cult group in 2013. I joined the group to avoid being killed.”
Owoseni said the suspect had been terrorising Ijanikin and its environs, adding that he would be charged to court soon.