General Motors was considering spending US$4bn on two Michigan plants to boost its electric vehicle production capacity, according to Reuters sources and documents made public.

GM has proposed building a $2.5bn battery plant near Lansing with partner LG Energy Solution, Reuters reported the documents showed.

The automaker separately was considering a $2b overhaul of its Orion Township assembly plant north of Detroit to build electric vehicles. The total investments could top $4 billion, a source told Reuters.

The news agency said documents posted by the city of Lansing showed GM was considering building a battery cell manufacturing plant in nearby Delta Township that could employ 1,700 people by 2028. The Lansing City Council was expected to consider the proposal today.

The joint venture battery plant would be 2.5m sq ft and on land currently owned by GM, the documents said, adding “the battery cell production facility will generate significant economic activity throughout Michigan”.