This is the second leader to die in Nyeri in three months after the death of third governor Dr Wahome Gakuru.
Assembly Majority Leader Mr James Kanyugo on Tuesday urged the central government to speed up the investigations into the death of his colleagues to rule out foul play, after it emerged that the late collapsed during a Jamhuri Day celebrations on the dais at Nduduini Primary School in Mathira Constituency.
“We hope and pray that this is a natural death but we want investigation conducted so we can rule out foul play,” Mr Kanyugo said.
Earlier, Nyeri Governor Mutahi Kahiga, who confirmed to the public of the death of the MCA, said that Mr Weru passed on while receiving treatment at Outspan Hospital, hours after he collapsed in the stadium where the Jamhuri day fete was organised.
According to the medic at the facility, Dr Jeff Muigai, however, Mr Weru suffered a heart attack.
The lawmaker was later rushed to Jamii Hospital and later transferred to Outspan Hospital in Nyeri town after his condition worsened.
“He went into cardiac arrest when he was Jamii Hospital and decision made that he needed to be under intensive care unit. We received him in a very critical condition,” Dr Muigai confirmed.
Earlier on Tuesday, Mr Weru was forced to cut short his speech during Jamhuri Day celebration at Nduduini Primary School in Mathira Constituency when he felt dizzy.
He took his seat and complained of a headache. He was immediately rushed to Jamii Hospital in Karatina town using Mathira MP Rigathi Gachagua's vehicle who was also attending the ceremony.
According to Nyeri County Assembly Speaker John Kaguchia doctors at the hospital tried to stabilise him but his condition worsened.
Mr Weru, who was serving as the chair of the Health committee, had attended special sitting at the assembly on Monday and appeared to be in good health. Mr Kaguchia described him as a friendly, reasonable and mature politician.
“He was a person who would resolve situation sin a very composed manner. Our prayer is that God spares the county from any other calamity,” Kaguchia said.
The deceased had a pending election petition before a Karatina court where Mr James Ndegwa Macharia is seeking to nullify the election
The deceased had 4,046 votes against the petitioner's 3,407 votes. His brother Nahashon, described him as a polite and selfless man. He has left behind a wife and two children.