However, no one was hurt in the incident.
Teresa’s parents and her siblings were in the house at the time.
“About 2.55am, we heard a loud ‘bang’ and my son (Sow Kuen) went to check and saw a man wearing a red t-shirt riding off on a motorcycle," Teresa's father told police.
"A warning letter containing threatening words and vulgarities was also attached to one of the bottles which was left outside the house."
There were nails inside the bottle. However, the petrol bombs did not explode.
Teresa's father Kok Kim Tong said he was informed by the police that had the bottles exploded, the nails would act like bullets and could be deadly. Teresa’s mother, Poon Seh Kwon, 71, was at her husband's side during the media briefing.
Teresa's family members are very shaken and now fear for their lives.
"I view this act as most despicable and criminal designed to instill fear, anxiety in me and to prevent me from performing my duties as an elected representative.
"I also attribute this despicable act to certain media groups and blogs that have deliberately demonised and portrayed me as chauvinistic, anti-Malay and anti-Islam," she said.
Teresa said the attack could be related to her recent detention under the ISA on Sept 12.
During her detention, Teresa also lodged police reports against Umno-owned daily Utusan Malaysia, its senior editor Zaini Hassan and former Selangor menteri besar Dr Mohd Khir Toyo for accusing her of involvement in the issues.
“I hope the police can give extra protection to my family members and also to all political leaders. If this can happen to me, it can also happen to anyone,” she asserted.
I'm sorry Teresa; I'm not too sure you will get proper protection. You are not Saiful!