Unexpected token import

[tbiinfotech]

I am getting following error:
import { Injectable } from "@angular/core";
^^^^^^

SyntaxError: Unexpected token import
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:139:10)
at Module._compile (module.js:607:28)
at Object.Module._extensions..js (module.js:654:10)
at Module.load (module.js:556:32)
at tryModuleLoad (module.js:499:12)
at Function.Module._load (module.js:491:3)
at Module.require (module.js:587:17)
at require (internal/module.js:11:18)
at Object.rgzQ (D:\yelo\dist\dist-server\main.bundle.js:1:620514)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! website@0.0.0 serve:universal: npm run build:universal && cd dist && node server
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the website@0.0.0 serve:universal script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

ng -v command is :
Angular CLI: 1.6.0
Node: 8.9.4
OS: win32 x64
Angular: 5.1.0
... animations, common, compiler, compiler-cli, core, forms
... http, platform-browser, platform-browser-dynamic
... platform-server, router

@angular/cli: 1.6.0
@angular/language-service: 4.4.6
@angular-devkit/build-optimizer: 0.0.35
@angular-devkit/core: 0.0.22
@angular-devkit/schematics: 0.0.41
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.0
@schematics/angular: 0.1.10
@schematics/schematics: 0.0.10
typescript: 2.4.2
webpack: 3.10.0

Can anyone suggest what should I change to remove the error?
Thank you!