Weru, 36, passed away Monday morning in Nairobi.
He was receiving treatment at the Intensive Care Unit at Ladnan Hospital when he developed breathing complications and efforts to resuscitate him failed.
The journalist was admitted to hospital two ago weeks after being taken ill immediately after returning from Israel where he was attending a conference.
At Avenue Hospital, where he was initially hospitalised, his condition slightly improved before it took a turn for the worse three days ago when he was moved to the ICU.
Throughout his time in hospital, his family friends and colleagues have been at his side and his death comes as a shock to many.
Following his death, there has been an outpouring of grief and tributes on social media from friends, colleagues and leaders.
His grieving father, Alloyse Kirira, said the family had lost a dependable member who was selfless and always willing to help.
Among those who mourned Weru was Devolution Cabinet Secretary Mwangi Kiunjuri, Senator Mutahi Kagwe, MPs Kanini Kega and Mathew Lempurkel, among other leaders.
His colleagues also remembered him for his dedication to duty.
Among those who worked with him closely for many years was Nyeri Bureau Chief, Francis Ngige who Monday said: “I don’t remember the last time I felt this low and devastated. I have lost a dedicated colleague and a friend.”
“It is so hard to believe you are gone. You taught me so much and never tired in extending your generosity and warmth even to strangers,” journalist Murimi Mwangi mourned yesterday.
Other colleagues, Carol Nderi and Jackie Mahugu, remembered Weru as a dedicated colleague who was known to churn out good human interest stories.He was a staunch Christian and is best remembered for his coverage of the Pope’s visit to Kenya and the beatification of Sister Irene Nyaatha.
He is survived by his wife Anne Muringo Njagi and daughters Esther and Mary.