Unexpected token ILLEGAL in main.js

[Sam747]

cli packages: (/home/medma/.nvm/versions/node/v7.0.0/lib/node_modules)

@ionic/cli-plugin-proxy : 1.4.6
@ionic/cli-utils        : 1.9.2
ionic (Ionic CLI)       : 3.9.2

global packages:

Cordova CLI : 7.0.1 

local packages:

@ionic/app-scripts : 3.1.0
Cordova Platforms  : android 6.2.3
Ionic Framework    : ionic-angular 3.9.2

System:

Android SDK Tools : 25.2.2
Node              : v7.0.0
npm               : 3.10.8 
OS                : Linux 4.2

I am getting following error when deploying the starter app on device
"Uncaught SyntaxError: Unexpected token ILLEGAL", source: file:///android_asset/www/build/main.js (61)